{ "schema_version": "foamforge-particles-v2", "access_date": "2026-10-10", "pressure_conversion": { "psi_to_mpa": 0.006894757293168 }, "scope": "Supplier references and explicit links to the unchanged legacy catalogue. Reference inclusion is not model or hydrostatic validation.", "sources": { "3m_s15": { "url": "https://www.3m.com/3M/en_US/p/dc/v000191956/", "title": "3M Glass Bubbles S15, 265lb", "source_date": null, "access_date": "2026-10-10", "type": "manufacturer_current_page", "reviewed_at": "2026-10-10", "retrieval_status": "retrieved_and_reviewed", "review_method": "Manufacturer webpage content inspection" }, "3m_compounding": { "url": "https://multimedia.3m.com/mws/media/1233016O/3m-glass-bubbles-compounding-and-injection-molding-guidelines.pdf", "title": "3M Glass Bubbles Compounding and Injection Molding Guidelines", "source_date": "2021-05", "access_date": "2026-10-10", "type": "manufacturer_pdf", "reviewed_at": "2026-10-10", "retrieval_status": "retrieved_and_reviewed", "content_sha256": "059eaf8babee79945abfcbef189f237ac8f1396e19d964da7b0032a7f23995ff", "review_method": "PDF text and rendered table/header inspection", "source_date_basis": "Footer on p.7: issued 5/21" }, "3m_im16k_method": { "url": "https://multimedia.3m.com/mws/media/868489O/3m-glass-bubbles-im16k-for-reinforced-thermoplastics.pdf", "title": "3M Glass Bubbles iM16K for Reinforced Thermoplastics, Table1", "source_date": "2016-10", "access_date": "2026-10-10", "type": "manufacturer_technical_paper", "reviewed_at": "2026-10-10", "retrieval_status": "retrieved_and_reviewed", "content_sha256": "46424f06d6d10979e1d70ea748a34aea489441a721f7787ee68514c6b6563b6a", "review_method": "PDF text and rendered table/header inspection", "source_date_basis": "Footer on p.5: issued 10/16", "limitations": "Table 1 reports iM16K particle properties; composite processing results in the paper are not validations of FoamForge predictions." }, "3m_overview": { "url": "https://multimedia.3m.com/mws/media/1028330O/3m-glass-bubbles-overview.pdf?fn=3M_Glass_Bubbles_Overview_0919_web_US_R6.pdf", "title": "3M Glass Bubbles Overview, table p11", "source_date": "2019-09", "source_date_basis": "Footer: issued 9/19, Rev B", "access_date": "2026-10-10", "type": "manufacturer_pdf", "reviewed_at": "2026-10-10", "retrieval_status": "retrieved_and_reviewed", "content_sha256": "e2c850421327c98cb9d5231534fba2229d7100b3241296cdcedeafa89956a64a", "review_method": "PDF text and rendered table/header inspection" }, "3m_uk_ks": { "url": "https://multimedia.3m.com/mws/media/619093O/3m-glass-bubbles-types-k-and-s-uk-data-sheet.ai?fn=K_S_Bubbles_UKdat.pdf", "title": "3M Glass Bubbles K Series / S Series Product Information", "source_date": null, "access_date": "2026-10-10", "type": "manufacturer_archival_pdf", "limitations": "Official URL serves a PDF with a postscript content type. Downloaded and visually reviewed on 2026-10-10. No issue date found; retains different S15 survival, S60/iM30K pressures and S38HS/S60HS/iM30K sizes as separate observations.", "reviewed_at": "2026-10-10", "retrieval_status": "retrieved_and_reviewed", "content_sha256": "b089c9261daf628a0c6b56cb673291c4fa96d1fc61367cc59a49a7881002ef73", "review_method": "PDF text and rendered table/header inspection" }, "3m_s60": { "url": "https://www.3m.com/3M/en_US/p/d/b40064607/", "title": "3M Glass Bubbles S60", "source_date": null, "access_date": "2026-10-10", "type": "manufacturer_current_page", "reviewed_at": "2026-10-10", "retrieval_status": "retrieved_and_reviewed", "review_method": "Manufacturer webpage content inspection" }, "3m_h50_rds": { "url": "https://multimedia.3m.com/mws/mediawebserver?mwsId=SSSSSu9n_zu8l00x4x_ZNxtGOv70k17zHvu9lxtD7xt1evSSSSSS-", "title": "3M Glass Bubbles Types H, H20/1000, H50/10000 Regulatory Data Sheet", "source_date": "2024-01-31", "access_date": "2026-10-10", "type": "manufacturer_regulatory_sheet", "limitations": "Verifies named H50/10000 family, not exact identity of bare legacy H50 in repo; no mechanical specification taken from RDS.", "reviewed_at": "2026-10-10", "retrieval_status": "retrieved_and_reviewed", "content_sha256": "cd2585165df7f229f9d0acea47c050429ff444a459c89144e0f08df34ea2cb25", "review_method": "PDF text and rendered table/header inspection" }, "ecco_web": { "url": "https://www.trelleborg.com/en/applied-technologies/products-and-solutions/hollow-shell-fillers/eccospheres", "title": "Trelleborg Eccospheres typical properties", "source_date": null, "access_date": "2026-10-10", "type": "manufacturer_current_page", "limitations": "Undated table; density described as average density \u00b10.02, no measurement method; psi footnote not displayed in parsed webpage.", "reviewed_at": "2026-10-10", "retrieval_status": "retrieved_and_reviewed", "review_method": "Manufacturer webpage content inspection" }, "ecco_2017": { "url": "https://www.trelleborg.com/applied-technologies/~/media/applied-technologies/en/resources/feb-2017-updates/trelleborg-datasheet-eccospheres-02.pdf", "title": "Trelleborg Eccospheres typical properties and ASTM D3102-78 footnote", "source_date": null, "source_date_basis": "URL path references February 2017, not proof of issue date", "access_date": "2026-10-10", "type": "manufacturer_archival_pdf", "limitations": "Historic sheet establishes 80% survival criterion for listed grades; vendor should confirm current specification.", "reviewed_at": "2026-10-10", "retrieval_status": "retrieved_and_reviewed", "content_sha256": "d56e5e30c75fc71ace1a04246cd7e660322beaa426e76dc4241629bd8862066c", "review_method": "PDF text and rendered table/header inspection" }, "ecco_electronic": { "url": "https://www.trelleborg.com/applied-technologies/-/media/applied-technologies/en/product-sheets/hollow-shell-fillers/trelleborg-eccospheres.pdf?rev=a8c27b251fb04003a5038e5d1ccfd5c1", "title": "Eccospheres for Electronic Applications, p2", "source_date": null, "access_date": "2026-10-10", "type": "manufacturer_pdf", "limitations": "PDF p.2 visibly prints SI200 nominal density as 130 kg/m3 versus 200 kg/m3 on the product page; SID160z differs from website SID-106Z. SID311z / FTD311z is a combined row; do not infer grade interchangeability. No pressure table.", "reviewed_at": "2026-10-10", "retrieval_status": "retrieved_and_reviewed", "content_sha256": "460679226c990997f5455ab7b13a5fac022d4db9ddd8917c8b18c3c03490f9d1", "review_method": "PDF text and rendered table/header inspection" }, "potters_web": { "url": "https://www.pottersindustries.com/micro-glass-beads/", "title": "Potters micro glass beads", "source_date": null, "access_date": "2026-10-10", "type": "manufacturer_current_page", "limitations": "Family-level properties, no current grade table or detailed pressure method.", "reviewed_at": "2026-10-10", "retrieval_status": "retrieved_and_reviewed", "review_method": "Manufacturer webpage content inspection" }, "potters_japan": { "url": "https://www.pqj.co.jp/en/%E4%B8%AD%E7%A9%BA%E3%82%AC%E3%83%A9%E3%82%B9%E3%83%93%E3%83%BC%E3%82%BA", "title": "Potters-Ballotini Japan hollow glass spheres", "source_date": null, "access_date": "2026-10-10", "type": "manufacturer_current_page", "limitations": "Explicitly names Sphericel110P8, no quantitative TDS. Corporate page confirms shareholder Potters International Holdings.", "reviewed_at": "2026-10-10", "retrieval_status": "retrieved_and_reviewed", "review_method": "Manufacturer webpage content inspection" }, "potters_sphericel_2012": { "url": "https://www.thecarycompany.com/media/pdf/adobe/Sphericel-TDS.pdf", "title": "Potters Sphericel General2012 manufacturer-authored sheet hosted by distributor", "source_date": "2012", "access_date": "2026-10-10", "type": "manufacturer_authored_distributor_hosted_archival_pdf", "limitations": "Historical data only. Current values/grade availability not established. Distinct2011sheet omits survival footnote; use this2012version.", "reviewed_at": "2026-10-10", "retrieval_status": "retrieved_and_reviewed", "content_sha256": "173f8e16d994c217d7c1e20d6e3ed69ce412968bf05a2964eb66b4c12f51a267", "review_method": "PDF text and rendered table/header inspection" }, "potters_qcel_archival": { "url": "https://www.thecarycompany.com/media/pdf/adobe/potters/q-cel-300-6014-6019-6028.pdf", "title": "Potters Q-CEL300/6014/6019/6028 historical sheet", "source_date": null, "access_date": "2026-10-10", "type": "manufacturer_authored_distributor_hosted_archival_pdf", "limitations": "Effective liquid-displacement density is not labelled true density. Not sufficient for current-grade verification.", "reviewed_at": "2026-10-10", "retrieval_status": "retrieved_and_reviewed", "content_sha256": "cf8403488d93655aae947f5a76f80e3c56d2a0a849b9412a51214f8453368439", "review_method": "PDF text and rendered table/header inspection" }, "local_psp": { "url": null, "title": "FoamGPT stored literature extraction", "path": "data/foamgpt_psp.csv", "access_date": "2026-10-10", "source_date": null, "type": "local_extracted_literature", "limitations": "Source labels and OCR are not confirmed supplier specifications; matching rows may not be independent.", "reviewed_at": "2026-10-10", "retrieval_status": "local_reference_reviewed", "review_method": "Stored extraction link review; original papers not revalidated", "content_sha256": "134f0acd9948897c4c656bcaf54460278ae01040fdc3a0337d198f57a1371689" }, "3m_s60_tds": { "url": "https://multimedia.3m.com/mws/media/184505O/3m-tm-glass-bubbles-s60.pdf?fn=gbs60.pdf", "title": "3M Glass Bubbles S60, typical physical properties", "source_date": "2017-07", "source_date_basis": "Footer on p.2: issued 7/17, Rev. B", "type": "manufacturer_pdf", "limitations": "Linked from the current S60 product page, but issued in 2017; typical properties, not specification values.", "access_date": "2026-10-10", "reviewed_at": "2026-10-10", "retrieval_status": "retrieved_and_reviewed", "review_method": "PDF text and rendered table inspection", "content_sha256": "079781c7c9e0a6e599af562d88582697a48bd632339a8753c29c4d5fb1225784" }, "3m_buoyancy_2020": { "url": "https://multimedia.3m.com/mws/media/1965520O/14473-glass-bubbles-insulation-and-buoyancy-sales-card-2020.pdf", "title": "3M Glass Bubbles for Buoyancy and Thermal Insulation", "source_date": "2020-09", "source_date_basis": "Footer on p.2: issued 9/20", "type": "manufacturer_pdf", "limitations": "Particle values corroborate selected overview rows. Foam densities and thermal conductivities in this sheet are calculated under stated assumptions, not measured qualified products.", "access_date": "2026-10-10", "reviewed_at": "2026-10-10", "retrieval_status": "retrieved_and_reviewed", "review_method": "PDF text and rendered table inspection", "content_sha256": "64791c96e7e2f72008f150f7f7d160e9a637580b6fdb78c4db79878ddc58d542" }, "3m_k1": { "url": "https://www.3m.com/3M/en_US/p/dc/v000194027/", "title": "3M Glass Bubbles K1, 210 lb (95 kg)", "source_date": null, "type": "manufacturer_current_page", "limitations": "Current public page corroborates particle density and pressure/survival; it is not a lot certificate or a foam depth qualification.", "access_date": "2026-10-10", "reviewed_at": "2026-10-10", "retrieval_status": "retrieved_and_reviewed", "review_method": "Manufacturer webpage content inspection" }, "local_legacy_particles": { "url": null, "title": "Superseded FoamForge particle reference export, before 2026-10-10 correction", "source_date": null, "type": "superseded_local_reference", "limitations": "Source hash identifies the old export at the recorded Git revision. Values are retained as historical observations; the current compatibility export is generated from this registry and is not a model input.", "access_date": "2026-10-10", "reviewed_at": "2026-10-10", "retrieval_status": "local_reference_reviewed", "review_method": "Local legacy data comparison", "content_sha256": "a8f4b1d6371ee606a854e8bfba6d1c5e581fed41009f0389d2ac824fcc9d6aca", "historical_path": "website/public/data/microballoons_3m.json", "git_revision": "51f1701078a9d2ed55fccda24bcf65b528f41dff" } }, "records": [ { "manufacturer": "3M", "family": "Glass Bubbles", "grade": "K1", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": 0.125, "reported_density_g_cm3": 0.125, "density_basis": "True density; table method not stated", "density_tolerance_g_cm3": null, "particle_size_statistic": "D50 by volume (3M QCM193.2)", "particle_size_um": 65, "pressure_psi": 250, "pressure_mpa": 1.723689, "pressure_property": "particle crush test pressure", "survival_percent": 80, "survival_basis": "Minimum fractional survival in source table", "test_method": null, "source_ids": [ "3m_overview", "3m_uk_ks", "3m_buoyancy_2020", "3m_k1" ], "source_url": "https://multimedia.3m.com/mws/media/1028330O/3m-glass-bubbles-overview.pdf?fn=3M_Glass_Bubbles_Overview_0919_web_US_R6.pdf", "source_date": "2019-09", "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "2019 supplier overview remains publicly hosted; obtain current lot/specification before procurement.", "Typical values, not specification values.", "Crush test method is not specified in this table; QCM193.2 footnote applies to size, not pressure." ], "alternate_observations": [ { "source_id": "3m_uk_ks", "source_date": null, "access_date": "2026-10-10", "locator": "PDF p.1 pressure/density tables; p.2 size table", "observation_status": "undated_supplier_version", "true_density_g_cm3": 0.125, "density_min_g_cm3": 0.1, "density_max_g_cm3": 0.14, "particle_size_statistic": "D50 by volume (3M QCM 193.0)", "particle_size_um": 65, "d10_um": 30, "d90_um": 115, "pressure_psi": 250, "pressure_mpa": 1.723689, "minimum_survival_percent": 80, "target_survival_percent": 90 } ], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "3m:k1", "model_status": "legacy_catalogue", "model_grade_id": "K1", "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "true_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, K1 row and table headings/footnote" }, "reported_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, K1 row and table headings/footnote" }, "density_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, K1 row and table headings/footnote" }, "particle_size_statistic": { "source_ids": [ "3m_overview" ], "locator": "p.11, K1 row and table headings/footnote" }, "particle_size_um": { "source_ids": [ "3m_overview" ], "locator": "p.11, K1 row and table headings/footnote" }, "pressure_psi": { "source_ids": [ "3m_overview" ], "locator": "p.11, K1 row and table headings/footnote" }, "pressure_property": { "source_ids": [ "3m_overview" ], "locator": "p.11, K1 row and table headings/footnote" }, "survival_percent": { "source_ids": [ "3m_overview" ], "locator": "p.11, K1 row and table headings/footnote" }, "survival_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, K1 row and table headings/footnote" }, "pressure_mpa": { "source_ids": [ "3m_overview" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "historical_supplier_reference" }, { "manufacturer": "3M", "family": "Glass Bubbles", "grade": "K15", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": 0.15, "reported_density_g_cm3": 0.15, "density_basis": "True density; table method not stated", "density_tolerance_g_cm3": null, "particle_size_statistic": "D50 by volume (3M QCM193.2)", "particle_size_um": 60, "pressure_psi": 300, "pressure_mpa": 2.068427, "pressure_property": "particle crush test pressure", "survival_percent": 80, "survival_basis": "Minimum fractional survival in source table", "test_method": null, "source_ids": [ "3m_overview", "3m_uk_ks", "3m_buoyancy_2020" ], "source_url": "https://multimedia.3m.com/mws/media/1028330O/3m-glass-bubbles-overview.pdf?fn=3M_Glass_Bubbles_Overview_0919_web_US_R6.pdf", "source_date": "2019-09", "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "2019 supplier overview remains publicly hosted; obtain current lot/specification before procurement.", "Typical values, not specification values.", "Crush test method is not specified in this table; QCM193.2 footnote applies to size, not pressure." ], "alternate_observations": [ { "source_id": "3m_uk_ks", "source_date": null, "access_date": "2026-10-10", "locator": "PDF p.1 pressure/density tables; p.2 size table", "observation_status": "undated_supplier_version", "true_density_g_cm3": 0.15, "density_min_g_cm3": 0.13, "density_max_g_cm3": 0.17, "particle_size_statistic": "D50 by volume (3M QCM 193.0)", "particle_size_um": 60, "d10_um": 30, "d90_um": 105, "pressure_psi": 300, "pressure_mpa": 2.068427, "minimum_survival_percent": 80, "target_survival_percent": 90 } ], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "3m:k15", "model_status": "legacy_catalogue", "model_grade_id": "K15", "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "true_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, K15 row and table headings/footnote" }, "reported_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, K15 row and table headings/footnote" }, "density_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, K15 row and table headings/footnote" }, "particle_size_statistic": { "source_ids": [ "3m_overview" ], "locator": "p.11, K15 row and table headings/footnote" }, "particle_size_um": { "source_ids": [ "3m_overview" ], "locator": "p.11, K15 row and table headings/footnote" }, "pressure_psi": { "source_ids": [ "3m_overview" ], "locator": "p.11, K15 row and table headings/footnote" }, "pressure_property": { "source_ids": [ "3m_overview" ], "locator": "p.11, K15 row and table headings/footnote" }, "survival_percent": { "source_ids": [ "3m_overview" ], "locator": "p.11, K15 row and table headings/footnote" }, "survival_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, K15 row and table headings/footnote" }, "pressure_mpa": { "source_ids": [ "3m_overview" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "historical_supplier_reference" }, { "manufacturer": "3M", "family": "Glass Bubbles", "grade": "K20", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": 0.2, "reported_density_g_cm3": 0.2, "density_basis": "True density; table method not stated", "density_tolerance_g_cm3": null, "particle_size_statistic": "D50 by volume (3M QCM193.2)", "particle_size_um": 60, "pressure_psi": 500, "pressure_mpa": 3.447379, "pressure_property": "particle crush test pressure", "survival_percent": 80, "survival_basis": "Minimum fractional survival in source table", "test_method": null, "source_ids": [ "3m_overview", "3m_uk_ks", "3m_buoyancy_2020" ], "source_url": "https://multimedia.3m.com/mws/media/1028330O/3m-glass-bubbles-overview.pdf?fn=3M_Glass_Bubbles_Overview_0919_web_US_R6.pdf", "source_date": "2019-09", "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "2019 supplier overview remains publicly hosted; obtain current lot/specification before procurement.", "Typical values, not specification values.", "Crush test method is not specified in this table; QCM193.2 footnote applies to size, not pressure." ], "alternate_observations": [ { "source_id": "3m_uk_ks", "source_date": null, "access_date": "2026-10-10", "locator": "PDF p.1 pressure/density tables; p.2 size table", "observation_status": "undated_supplier_version", "true_density_g_cm3": 0.2, "density_min_g_cm3": 0.18, "density_max_g_cm3": 0.22, "particle_size_statistic": "D50 by volume (3M QCM 193.0)", "particle_size_um": 60, "d10_um": 30, "d90_um": 90, "pressure_psi": 500, "pressure_mpa": 3.447379, "minimum_survival_percent": 80, "target_survival_percent": 90 } ], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "3m:k20", "model_status": "legacy_catalogue", "model_grade_id": "K20", "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "true_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, K20 row and table headings/footnote" }, "reported_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, K20 row and table headings/footnote" }, "density_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, K20 row and table headings/footnote" }, "particle_size_statistic": { "source_ids": [ "3m_overview" ], "locator": "p.11, K20 row and table headings/footnote" }, "particle_size_um": { "source_ids": [ "3m_overview" ], "locator": "p.11, K20 row and table headings/footnote" }, "pressure_psi": { "source_ids": [ "3m_overview" ], "locator": "p.11, K20 row and table headings/footnote" }, "pressure_property": { "source_ids": [ "3m_overview" ], "locator": "p.11, K20 row and table headings/footnote" }, "survival_percent": { "source_ids": [ "3m_overview" ], "locator": "p.11, K20 row and table headings/footnote" }, "survival_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, K20 row and table headings/footnote" }, "pressure_mpa": { "source_ids": [ "3m_overview" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "historical_supplier_reference" }, { "manufacturer": "3M", "family": "Glass Bubbles", "grade": "K25", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": 0.25, "reported_density_g_cm3": 0.25, "density_basis": "True density; table method not stated", "density_tolerance_g_cm3": null, "particle_size_statistic": "D50 by volume (3M QCM193.2)", "particle_size_um": 55, "pressure_psi": 750, "pressure_mpa": 5.171068, "pressure_property": "particle crush test pressure", "survival_percent": 80, "survival_basis": "Minimum fractional survival in source table", "test_method": null, "source_ids": [ "3m_overview", "3m_uk_ks", "3m_buoyancy_2020" ], "source_url": "https://multimedia.3m.com/mws/media/1028330O/3m-glass-bubbles-overview.pdf?fn=3M_Glass_Bubbles_Overview_0919_web_US_R6.pdf", "source_date": "2019-09", "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "2019 supplier overview remains publicly hosted; obtain current lot/specification before procurement.", "Typical values, not specification values.", "Crush test method is not specified in this table; QCM193.2 footnote applies to size, not pressure." ], "alternate_observations": [ { "source_id": "3m_uk_ks", "source_date": null, "access_date": "2026-10-10", "locator": "PDF p.1 pressure/density tables; p.2 size table", "observation_status": "undated_supplier_version", "true_density_g_cm3": 0.25, "density_min_g_cm3": 0.23, "density_max_g_cm3": 0.27, "particle_size_statistic": "D50 by volume (3M QCM 193.0)", "particle_size_um": 55, "d10_um": 25, "d90_um": 90, "pressure_psi": 750, "pressure_mpa": 5.171068, "minimum_survival_percent": 80, "target_survival_percent": 90 } ], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "3m:k25", "model_status": "legacy_catalogue", "model_grade_id": "K25", "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "true_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, K25 row and table headings/footnote" }, "reported_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, K25 row and table headings/footnote" }, "density_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, K25 row and table headings/footnote" }, "particle_size_statistic": { "source_ids": [ "3m_overview" ], "locator": "p.11, K25 row and table headings/footnote" }, "particle_size_um": { "source_ids": [ "3m_overview" ], "locator": "p.11, K25 row and table headings/footnote" }, "pressure_psi": { "source_ids": [ "3m_overview" ], "locator": "p.11, K25 row and table headings/footnote" }, "pressure_property": { "source_ids": [ "3m_overview" ], "locator": "p.11, K25 row and table headings/footnote" }, "survival_percent": { "source_ids": [ "3m_overview" ], "locator": "p.11, K25 row and table headings/footnote" }, "survival_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, K25 row and table headings/footnote" }, "pressure_mpa": { "source_ids": [ "3m_overview" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "historical_supplier_reference" }, { "manufacturer": "3M", "family": "Glass Bubbles", "grade": "K37", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": 0.37, "reported_density_g_cm3": 0.37, "density_basis": "True density; table method not stated", "density_tolerance_g_cm3": null, "particle_size_statistic": "D50 by volume (3M QCM193.2)", "particle_size_um": 45, "pressure_psi": 3000, "pressure_mpa": 20.684272, "pressure_property": "particle crush test pressure", "survival_percent": 80, "survival_basis": "Minimum fractional survival in source table", "test_method": null, "source_ids": [ "3m_overview", "3m_uk_ks" ], "source_url": "https://multimedia.3m.com/mws/media/1028330O/3m-glass-bubbles-overview.pdf?fn=3M_Glass_Bubbles_Overview_0919_web_US_R6.pdf", "source_date": "2019-09", "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "2019 supplier overview remains publicly hosted; obtain current lot/specification before procurement.", "Typical values, not specification values.", "Crush test method is not specified in this table; QCM193.2 footnote applies to size, not pressure." ], "alternate_observations": [ { "source_id": "3m_uk_ks", "source_date": null, "access_date": "2026-10-10", "locator": "PDF p.1 pressure/density tables; p.2 size table", "observation_status": "undated_supplier_version", "true_density_g_cm3": 0.37, "density_min_g_cm3": 0.34, "density_max_g_cm3": 0.4, "particle_size_statistic": "D50 by volume (3M QCM 193.0)", "particle_size_um": 45, "d10_um": 20, "d90_um": 80, "pressure_psi": 3000, "pressure_mpa": 20.684272, "minimum_survival_percent": 80, "target_survival_percent": 90 } ], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "3m:k37", "model_status": "reference_only", "model_grade_id": null, "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "true_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, K37 row and table headings/footnote" }, "reported_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, K37 row and table headings/footnote" }, "density_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, K37 row and table headings/footnote" }, "particle_size_statistic": { "source_ids": [ "3m_overview" ], "locator": "p.11, K37 row and table headings/footnote" }, "particle_size_um": { "source_ids": [ "3m_overview" ], "locator": "p.11, K37 row and table headings/footnote" }, "pressure_psi": { "source_ids": [ "3m_overview" ], "locator": "p.11, K37 row and table headings/footnote" }, "pressure_property": { "source_ids": [ "3m_overview" ], "locator": "p.11, K37 row and table headings/footnote" }, "survival_percent": { "source_ids": [ "3m_overview" ], "locator": "p.11, K37 row and table headings/footnote" }, "survival_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, K37 row and table headings/footnote" }, "pressure_mpa": { "source_ids": [ "3m_overview" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "historical_supplier_reference" }, { "manufacturer": "3M", "family": "Glass Bubbles", "grade": "K46", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": 0.46, "reported_density_g_cm3": 0.46, "density_basis": "True density; table method not stated", "density_tolerance_g_cm3": null, "particle_size_statistic": "D50 by volume (3M QCM193.2)", "particle_size_um": 40, "pressure_psi": 6000, "pressure_mpa": 41.368544, "pressure_property": "particle crush test pressure", "survival_percent": 80, "survival_basis": "Minimum fractional survival in source table", "test_method": null, "source_ids": [ "3m_overview", "3m_uk_ks", "3m_buoyancy_2020", "3m_compounding" ], "source_url": "https://multimedia.3m.com/mws/media/1028330O/3m-glass-bubbles-overview.pdf?fn=3M_Glass_Bubbles_Overview_0919_web_US_R6.pdf", "source_date": "2019-09", "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "2019 supplier overview remains publicly hosted; obtain current lot/specification before procurement.", "Typical values, not specification values.", "Crush test method is not specified in this table; QCM193.2 footnote applies to size, not pressure." ], "alternate_observations": [ { "source_id": "3m_uk_ks", "source_date": null, "access_date": "2026-10-10", "locator": "PDF p.1 pressure/density tables; p.2 size table", "observation_status": "undated_supplier_version", "true_density_g_cm3": 0.46, "density_min_g_cm3": 0.43, "density_max_g_cm3": 0.49, "particle_size_statistic": "D50 by volume (3M QCM 193.0)", "particle_size_um": 40, "d10_um": 15, "d90_um": 70, "pressure_psi": 6000, "pressure_mpa": 41.368544, "minimum_survival_percent": 80, "target_survival_percent": 90 } ], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "3m:k46", "model_status": "legacy_catalogue", "model_grade_id": "K46", "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "true_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, K46 row and table headings/footnote" }, "reported_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, K46 row and table headings/footnote" }, "density_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, K46 row and table headings/footnote" }, "particle_size_statistic": { "source_ids": [ "3m_overview" ], "locator": "p.11, K46 row and table headings/footnote" }, "particle_size_um": { "source_ids": [ "3m_overview" ], "locator": "p.11, K46 row and table headings/footnote" }, "pressure_psi": { "source_ids": [ "3m_overview" ], "locator": "p.11, K46 row and table headings/footnote" }, "pressure_property": { "source_ids": [ "3m_overview" ], "locator": "p.11, K46 row and table headings/footnote" }, "survival_percent": { "source_ids": [ "3m_overview" ], "locator": "p.11, K46 row and table headings/footnote" }, "survival_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, K46 row and table headings/footnote" }, "pressure_mpa": { "source_ids": [ "3m_overview" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "historical_supplier_reference" }, { "manufacturer": "3M", "family": "Glass Bubbles", "grade": "S15", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": 0.15, "reported_density_g_cm3": 0.15, "density_basis": "True density; table method not stated", "density_tolerance_g_cm3": null, "particle_size_statistic": "D50 by volume (3M QCM193.2)", "particle_size_um": 55, "pressure_psi": 300, "pressure_mpa": 2.068427, "pressure_property": "particle crush test pressure", "survival_percent": 85, "survival_basis": "Minimum fractional survival in source table", "test_method": null, "source_ids": [ "3m_overview", "3m_s15", "3m_uk_ks", "3m_buoyancy_2020" ], "source_url": "https://multimedia.3m.com/mws/media/1028330O/3m-glass-bubbles-overview.pdf?fn=3M_Glass_Bubbles_Overview_0919_web_US_R6.pdf", "source_date": "2019-09", "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "2019 supplier overview remains publicly hosted; obtain current lot/specification before procurement.", "Typical values, not specification values.", "Crush test method is not specified in this table; QCM193.2 footnote applies to size, not pressure.", "Official source conflict: overview gives 85% minimum; undated UK sheet gives 80% minimum / 90% target at 300 psi." ], "alternate_observations": [ { "source_id": "3m_uk_ks", "source_date": null, "access_date": "2026-10-10", "locator": "PDF p.1 pressure/density tables; p.2 size table", "observation_status": "undated_supplier_version", "true_density_g_cm3": 0.15, "density_min_g_cm3": 0.13, "density_max_g_cm3": 0.17, "particle_size_statistic": "D50 by volume (3M QCM 193.0)", "particle_size_um": 55, "d10_um": 25, "d90_um": 90, "pressure_psi": 300, "pressure_mpa": 2.068427, "minimum_survival_percent": 80, "target_survival_percent": 90 } ], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "3m:s15", "model_status": "reference_only", "model_grade_id": null, "review_required": true, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "true_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, S15 row and table headings/footnote" }, "reported_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, S15 row and table headings/footnote" }, "density_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, S15 row and table headings/footnote" }, "particle_size_statistic": { "source_ids": [ "3m_overview" ], "locator": "p.11, S15 row and table headings/footnote" }, "particle_size_um": { "source_ids": [ "3m_overview" ], "locator": "p.11, S15 row and table headings/footnote" }, "pressure_psi": { "source_ids": [ "3m_overview" ], "locator": "p.11, S15 row and table headings/footnote" }, "pressure_property": { "source_ids": [ "3m_overview" ], "locator": "p.11, S15 row and table headings/footnote" }, "survival_percent": { "source_ids": [ "3m_overview" ], "locator": "p.11, S15 row and table headings/footnote" }, "survival_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, S15 row and table headings/footnote" }, "pressure_mpa": { "source_ids": [ "3m_overview" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "historical_supplier_reference" }, { "manufacturer": "3M", "family": "Glass Bubbles", "grade": "S22", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": 0.22, "reported_density_g_cm3": 0.22, "density_basis": "True density; table method not stated", "density_tolerance_g_cm3": null, "particle_size_statistic": "D50 by volume (3M QCM193.2)", "particle_size_um": 35, "pressure_psi": 400, "pressure_mpa": 2.757903, "pressure_property": "particle crush test pressure", "survival_percent": 80, "survival_basis": "Minimum fractional survival in source table", "test_method": null, "source_ids": [ "3m_overview", "3m_uk_ks" ], "source_url": "https://multimedia.3m.com/mws/media/1028330O/3m-glass-bubbles-overview.pdf?fn=3M_Glass_Bubbles_Overview_0919_web_US_R6.pdf", "source_date": "2019-09", "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "2019 supplier overview remains publicly hosted; obtain current lot/specification before procurement.", "Typical values, not specification values.", "Crush test method is not specified in this table; QCM193.2 footnote applies to size, not pressure." ], "alternate_observations": [ { "source_id": "3m_uk_ks", "source_date": null, "access_date": "2026-10-10", "locator": "PDF p.1 pressure/density tables; p.2 size table", "observation_status": "undated_supplier_version", "true_density_g_cm3": 0.22, "density_min_g_cm3": 0.19, "density_max_g_cm3": 0.25, "particle_size_statistic": "D50 by volume (3M QCM 193.0)", "particle_size_um": 35, "d10_um": 20, "d90_um": 65, "pressure_psi": 400, "pressure_mpa": 2.757903, "minimum_survival_percent": 80, "target_survival_percent": 90 } ], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "3m:s22", "model_status": "legacy_catalogue", "model_grade_id": "S22", "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "true_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, S22 row and table headings/footnote" }, "reported_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, S22 row and table headings/footnote" }, "density_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, S22 row and table headings/footnote" }, "particle_size_statistic": { "source_ids": [ "3m_overview" ], "locator": "p.11, S22 row and table headings/footnote" }, "particle_size_um": { "source_ids": [ "3m_overview" ], "locator": "p.11, S22 row and table headings/footnote" }, "pressure_psi": { "source_ids": [ "3m_overview" ], "locator": "p.11, S22 row and table headings/footnote" }, "pressure_property": { "source_ids": [ "3m_overview" ], "locator": "p.11, S22 row and table headings/footnote" }, "survival_percent": { "source_ids": [ "3m_overview" ], "locator": "p.11, S22 row and table headings/footnote" }, "survival_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, S22 row and table headings/footnote" }, "pressure_mpa": { "source_ids": [ "3m_overview" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "historical_supplier_reference" }, { "manufacturer": "3M", "family": "Glass Bubbles", "grade": "S32", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": 0.32, "reported_density_g_cm3": 0.32, "density_basis": "True density; table method not stated", "density_tolerance_g_cm3": null, "particle_size_statistic": "D50 by volume (3M QCM193.2)", "particle_size_um": 40, "pressure_psi": 2000, "pressure_mpa": 13.789515, "pressure_property": "particle crush test pressure", "survival_percent": 80, "survival_basis": "Minimum fractional survival in source table", "test_method": null, "source_ids": [ "3m_overview", "3m_uk_ks" ], "source_url": "https://multimedia.3m.com/mws/media/1028330O/3m-glass-bubbles-overview.pdf?fn=3M_Glass_Bubbles_Overview_0919_web_US_R6.pdf", "source_date": "2019-09", "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "2019 supplier overview remains publicly hosted; obtain current lot/specification before procurement.", "Typical values, not specification values.", "Crush test method is not specified in this table; QCM193.2 footnote applies to size, not pressure." ], "alternate_observations": [ { "source_id": "3m_uk_ks", "source_date": null, "access_date": "2026-10-10", "locator": "PDF p.1 pressure/density tables; p.2 size table", "observation_status": "undated_supplier_version", "true_density_g_cm3": 0.32, "density_min_g_cm3": 0.29, "density_max_g_cm3": 0.35, "particle_size_statistic": "D50 by volume (3M QCM 193.0)", "particle_size_um": 40, "d10_um": 20, "d90_um": 70, "pressure_psi": 2000, "pressure_mpa": 13.789515, "minimum_survival_percent": 80, "target_survival_percent": 90 } ], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "3m:s32", "model_status": "legacy_catalogue", "model_grade_id": "S32", "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "true_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, S32 row and table headings/footnote" }, "reported_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, S32 row and table headings/footnote" }, "density_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, S32 row and table headings/footnote" }, "particle_size_statistic": { "source_ids": [ "3m_overview" ], "locator": "p.11, S32 row and table headings/footnote" }, "particle_size_um": { "source_ids": [ "3m_overview" ], "locator": "p.11, S32 row and table headings/footnote" }, "pressure_psi": { "source_ids": [ "3m_overview" ], "locator": "p.11, S32 row and table headings/footnote" }, "pressure_property": { "source_ids": [ "3m_overview" ], "locator": "p.11, S32 row and table headings/footnote" }, "survival_percent": { "source_ids": [ "3m_overview" ], "locator": "p.11, S32 row and table headings/footnote" }, "survival_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, S32 row and table headings/footnote" }, "pressure_mpa": { "source_ids": [ "3m_overview" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "historical_supplier_reference" }, { "manufacturer": "3M", "family": "Glass Bubbles", "grade": "S35", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": 0.35, "reported_density_g_cm3": 0.35, "density_basis": "True density; table method not stated", "density_tolerance_g_cm3": null, "particle_size_statistic": "D50 by volume (3M QCM193.2)", "particle_size_um": 40, "pressure_psi": 3000, "pressure_mpa": 20.684272, "pressure_property": "particle crush test pressure", "survival_percent": 80, "survival_basis": "Minimum fractional survival in source table", "test_method": null, "source_ids": [ "3m_overview", "3m_uk_ks", "3m_buoyancy_2020" ], "source_url": "https://multimedia.3m.com/mws/media/1028330O/3m-glass-bubbles-overview.pdf?fn=3M_Glass_Bubbles_Overview_0919_web_US_R6.pdf", "source_date": "2019-09", "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "2019 supplier overview remains publicly hosted; obtain current lot/specification before procurement.", "Typical values, not specification values.", "Crush test method is not specified in this table; QCM193.2 footnote applies to size, not pressure." ], "alternate_observations": [ { "source_id": "3m_uk_ks", "source_date": null, "access_date": "2026-10-10", "locator": "PDF p.1 pressure/density tables; p.2 size table", "observation_status": "undated_supplier_version", "true_density_g_cm3": 0.35, "density_min_g_cm3": 0.32, "density_max_g_cm3": 0.38, "particle_size_statistic": "D50 by volume (3M QCM 193.0)", "particle_size_um": 40, "d10_um": 20, "d90_um": 65, "pressure_psi": 3000, "pressure_mpa": 20.684272, "minimum_survival_percent": 80, "target_survival_percent": 90 } ], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "3m:s35", "model_status": "reference_only", "model_grade_id": null, "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "true_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, S35 row and table headings/footnote" }, "reported_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, S35 row and table headings/footnote" }, "density_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, S35 row and table headings/footnote" }, "particle_size_statistic": { "source_ids": [ "3m_overview" ], "locator": "p.11, S35 row and table headings/footnote" }, "particle_size_um": { "source_ids": [ "3m_overview" ], "locator": "p.11, S35 row and table headings/footnote" }, "pressure_psi": { "source_ids": [ "3m_overview" ], "locator": "p.11, S35 row and table headings/footnote" }, "pressure_property": { "source_ids": [ "3m_overview" ], "locator": "p.11, S35 row and table headings/footnote" }, "survival_percent": { "source_ids": [ "3m_overview" ], "locator": "p.11, S35 row and table headings/footnote" }, "survival_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, S35 row and table headings/footnote" }, "pressure_mpa": { "source_ids": [ "3m_overview" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "historical_supplier_reference" }, { "manufacturer": "3M", "family": "Glass Bubbles", "grade": "S38", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": 0.38, "reported_density_g_cm3": 0.38, "density_basis": "True density; table method not stated", "density_tolerance_g_cm3": null, "particle_size_statistic": "D50 by volume (3M QCM193.2)", "particle_size_um": 40, "pressure_psi": 4000, "pressure_mpa": 27.579029, "pressure_property": "particle crush test pressure", "survival_percent": 80, "survival_basis": "Minimum fractional survival in source table", "test_method": null, "source_ids": [ "3m_overview", "3m_uk_ks", "3m_buoyancy_2020" ], "source_url": "https://multimedia.3m.com/mws/media/1028330O/3m-glass-bubbles-overview.pdf?fn=3M_Glass_Bubbles_Overview_0919_web_US_R6.pdf", "source_date": "2019-09", "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "2019 supplier overview remains publicly hosted; obtain current lot/specification before procurement.", "Typical values, not specification values.", "Crush test method is not specified in this table; QCM193.2 footnote applies to size, not pressure." ], "alternate_observations": [ { "source_id": "3m_uk_ks", "source_date": null, "access_date": "2026-10-10", "locator": "PDF p.1 pressure/density tables; p.2 size table", "observation_status": "undated_supplier_version", "true_density_g_cm3": 0.38, "density_min_g_cm3": 0.35, "density_max_g_cm3": 0.41, "particle_size_statistic": "D50 by volume (3M QCM 193.0)", "particle_size_um": 40, "d10_um": 15, "d90_um": 75, "pressure_psi": 4000, "pressure_mpa": 27.579029, "minimum_survival_percent": 80, "target_survival_percent": 90 } ], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "3m:s38", "model_status": "legacy_catalogue", "model_grade_id": "S38", "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "true_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, S38 row and table headings/footnote" }, "reported_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, S38 row and table headings/footnote" }, "density_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, S38 row and table headings/footnote" }, "particle_size_statistic": { "source_ids": [ "3m_overview" ], "locator": "p.11, S38 row and table headings/footnote" }, "particle_size_um": { "source_ids": [ "3m_overview" ], "locator": "p.11, S38 row and table headings/footnote" }, "pressure_psi": { "source_ids": [ "3m_overview" ], "locator": "p.11, S38 row and table headings/footnote" }, "pressure_property": { "source_ids": [ "3m_overview" ], "locator": "p.11, S38 row and table headings/footnote" }, "survival_percent": { "source_ids": [ "3m_overview" ], "locator": "p.11, S38 row and table headings/footnote" }, "survival_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, S38 row and table headings/footnote" }, "pressure_mpa": { "source_ids": [ "3m_overview" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "historical_supplier_reference" }, { "manufacturer": "3M", "family": "Glass Bubbles", "grade": "S38HS", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": 0.38, "reported_density_g_cm3": 0.38, "density_basis": "True density; table method not stated", "density_tolerance_g_cm3": null, "particle_size_statistic": "D50 by volume (3M QCM193.2)", "particle_size_um": 40, "pressure_psi": 5500, "pressure_mpa": 37.921165, "pressure_property": "particle crush test pressure", "survival_percent": 80, "survival_basis": "Minimum fractional survival in source table", "test_method": null, "source_ids": [ "3m_overview", "3m_uk_ks", "3m_buoyancy_2020", "3m_compounding" ], "source_url": "https://multimedia.3m.com/mws/media/1028330O/3m-glass-bubbles-overview.pdf?fn=3M_Glass_Bubbles_Overview_0919_web_US_R6.pdf", "source_date": "2019-09", "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "2019 supplier overview remains publicly hosted; obtain current lot/specification before procurement.", "Typical values, not specification values.", "Crush test method is not specified in this table; QCM193.2 footnote applies to size, not pressure.", "Undated UK sheet gives D50 by volume 44 um under QCM 193.0; 2019 overview gives 40 um under QCM 193.2. Distinct source versions/methods retained; no interchangeable size assumed." ], "alternate_observations": [ { "source_id": "3m_uk_ks", "source_date": null, "access_date": "2026-10-10", "locator": "PDF p.1 pressure/density tables; p.2 size table", "observation_status": "undated_supplier_version", "true_density_g_cm3": 0.38, "density_min_g_cm3": 0.35, "density_max_g_cm3": 0.41, "particle_size_statistic": "D50 by volume (3M QCM 193.0)", "particle_size_um": 44, "d10_um": 19, "d90_um": 70, "pressure_psi": 5500, "pressure_mpa": 37.921165, "minimum_survival_percent": 80, "target_survival_percent": 90 } ], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "3m:s38hs", "model_status": "reference_only", "model_grade_id": null, "review_required": true, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "true_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, S38HS row and table headings/footnote" }, "reported_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, S38HS row and table headings/footnote" }, "density_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, S38HS row and table headings/footnote" }, "particle_size_statistic": { "source_ids": [ "3m_overview" ], "locator": "p.11, S38HS row and table headings/footnote" }, "particle_size_um": { "source_ids": [ "3m_overview" ], "locator": "p.11, S38HS row and table headings/footnote" }, "pressure_psi": { "source_ids": [ "3m_overview" ], "locator": "p.11, S38HS row and table headings/footnote" }, "pressure_property": { "source_ids": [ "3m_overview" ], "locator": "p.11, S38HS row and table headings/footnote" }, "survival_percent": { "source_ids": [ "3m_overview" ], "locator": "p.11, S38HS row and table headings/footnote" }, "survival_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, S38HS row and table headings/footnote" }, "pressure_mpa": { "source_ids": [ "3m_overview" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "historical_supplier_reference" }, { "manufacturer": "3M", "family": "Glass Bubbles", "grade": "S60", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": 0.6, "reported_density_g_cm3": 0.6, "density_basis": "True density; table method not stated", "density_tolerance_g_cm3": null, "particle_size_statistic": "D50 by volume (3M QCM193.2)", "particle_size_um": 30, "pressure_psi": 6000, "pressure_mpa": 41.368544, "pressure_property": "particle crush test pressure", "survival_percent": 90, "survival_basis": "90% survival by volume (2017 S60 datasheet); overview gives minimum fractional survival", "test_method": null, "source_ids": [ "3m_overview", "3m_s60", "3m_uk_ks", "3m_compounding", "local_legacy_particles", "3m_s60_tds" ], "source_url": "https://multimedia.3m.com/mws/media/1028330O/3m-glass-bubbles-overview.pdf?fn=3M_Glass_Bubbles_Overview_0919_web_US_R6.pdf", "source_date": "2019-09", "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "2019 supplier overview remains publicly hosted; obtain current lot/specification before procurement.", "Typical values, not specification values.", "Crush test method is not specified in this table; QCM193.2 footnote applies to size, not pressure.", "Current product page corroborates 6,000 psi / 90% survival. Legacy 10,000 psi / 80% basis must be retained as separate versioned observation, not mixed." ], "alternate_observations": [ { "source_id": "3m_uk_ks", "source_date": null, "access_date": "2026-10-10", "locator": "PDF p.1 pressure/density tables; p.2 size table", "observation_status": "undated_supplier_version", "true_density_g_cm3": 0.6, "density_min_g_cm3": 0.57, "density_max_g_cm3": 0.63, "particle_size_statistic": "D50 by volume (3M QCM 193.0)", "particle_size_um": 30, "d10_um": 15, "d90_um": 55, "pressure_psi": 10000, "pressure_mpa": 68.947573, "minimum_survival_percent": 80, "target_survival_percent": 90 }, { "pressure_mpa": 68.9, "source_id": "local_legacy_particles", "observation_status": "superseded_local_reference", "locator": "S60 entry", "access_date": "2026-10-10", "source_date": null } ], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "3m:s60", "model_status": "legacy_catalogue", "model_grade_id": "S60", "review_required": true, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "true_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, S60 row and table headings/footnote" }, "reported_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, S60 row and table headings/footnote" }, "density_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, S60 row and table headings/footnote" }, "particle_size_statistic": { "source_ids": [ "3m_overview" ], "locator": "p.11, S60 row and table headings/footnote" }, "particle_size_um": { "source_ids": [ "3m_overview" ], "locator": "p.11, S60 row and table headings/footnote" }, "pressure_psi": { "source_ids": [ "3m_overview" ], "locator": "p.11, S60 row and table headings/footnote" }, "pressure_property": { "source_ids": [ "3m_overview" ], "locator": "p.11, S60 row and table headings/footnote" }, "survival_percent": { "source_ids": [ "3m_overview" ], "locator": "p.11, S60 row and table headings/footnote" }, "survival_basis": { "source_ids": [ "3m_s60_tds", "3m_overview" ], "locator": "S60 datasheet p.1 typical properties; overview p.11" }, "pressure_mpa": { "source_ids": [ "3m_overview" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "historical_supplier_reference" }, { "manufacturer": "3M", "family": "Glass Bubbles", "grade": "S60HS", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": 0.6, "reported_density_g_cm3": 0.6, "density_basis": "True density; table method not stated", "density_tolerance_g_cm3": null, "particle_size_statistic": "D50 by volume (3M QCM193.2)", "particle_size_um": 30, "pressure_psi": 18000, "pressure_mpa": 124.105631, "pressure_property": "particle crush test pressure", "survival_percent": 90, "survival_basis": "Minimum fractional survival in source table", "test_method": null, "source_ids": [ "3m_overview", "3m_uk_ks", "3m_compounding" ], "source_url": "https://multimedia.3m.com/mws/media/1028330O/3m-glass-bubbles-overview.pdf?fn=3M_Glass_Bubbles_Overview_0919_web_US_R6.pdf", "source_date": "2019-09", "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "2019 supplier overview remains publicly hosted; obtain current lot/specification before procurement.", "Typical values, not specification values.", "Crush test method is not specified in this table; QCM193.2 footnote applies to size, not pressure.", "Undated UK sheet gives D50 by volume 29 um under QCM 193.0; 2019 overview gives 30 um under QCM 193.2. Distinct source versions/methods retained; no interchangeable size assumed." ], "alternate_observations": [ { "source_id": "3m_uk_ks", "source_date": null, "access_date": "2026-10-10", "locator": "PDF p.1 pressure/density tables; p.2 size table", "observation_status": "undated_supplier_version", "true_density_g_cm3": 0.6, "density_min_g_cm3": 0.57, "density_max_g_cm3": 0.63, "particle_size_statistic": "D50 by volume (3M QCM 193.0)", "particle_size_um": 29, "d10_um": 12, "d90_um": 48, "pressure_psi": 18000, "pressure_mpa": 124.105631, "minimum_survival_percent": 90, "target_survival_percent": 90 } ], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "3m:s60hs", "model_status": "reference_only", "model_grade_id": null, "review_required": true, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "true_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, S60HS row and table headings/footnote" }, "reported_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, S60HS row and table headings/footnote" }, "density_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, S60HS row and table headings/footnote" }, "particle_size_statistic": { "source_ids": [ "3m_overview" ], "locator": "p.11, S60HS row and table headings/footnote" }, "particle_size_um": { "source_ids": [ "3m_overview" ], "locator": "p.11, S60HS row and table headings/footnote" }, "pressure_psi": { "source_ids": [ "3m_overview" ], "locator": "p.11, S60HS row and table headings/footnote" }, "pressure_property": { "source_ids": [ "3m_overview" ], "locator": "p.11, S60HS row and table headings/footnote" }, "survival_percent": { "source_ids": [ "3m_overview" ], "locator": "p.11, S60HS row and table headings/footnote" }, "survival_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, S60HS row and table headings/footnote" }, "pressure_mpa": { "source_ids": [ "3m_overview" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "historical_supplier_reference" }, { "manufacturer": "3M", "family": "Glass Bubbles", "grade": "iM16K", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": 0.46, "reported_density_g_cm3": 0.46, "density_basis": "True density; table method not stated", "density_tolerance_g_cm3": 0.03, "particle_size_statistic": "D50 by volume (3M QCM193.2)", "particle_size_um": 20, "pressure_psi": 16000, "pressure_mpa": 110.316117, "pressure_property": "particle crush test pressure", "survival_percent": 90, "survival_basis": "Minimum fractional survival in source table", "test_method": "3M QCM 14.1.83M (2016 technical paper, Table 1)", "source_ids": [ "3m_overview", "3m_im16k_method", "3m_buoyancy_2020", "3m_compounding" ], "source_url": "https://multimedia.3m.com/mws/media/1028330O/3m-glass-bubbles-overview.pdf?fn=3M_Glass_Bubbles_Overview_0919_web_US_R6.pdf", "source_date": "2019-09", "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "2019 supplier overview remains publicly hosted; obtain current lot/specification before procurement.", "Typical values, not specification values.", "Pressure method and density tolerance come from the 2016 iM16K technical paper; size D50 weighting/method comes from the 2019 overview. These sources are not a current lot certificate." ], "alternate_observations": [], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "3m:im16k", "model_status": "reference_only", "model_grade_id": null, "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "true_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, iM16K row and table headings/footnote" }, "reported_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, iM16K row and table headings/footnote" }, "density_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, iM16K row and table headings/footnote" }, "particle_size_statistic": { "source_ids": [ "3m_overview" ], "locator": "p.11, iM16K row and table headings/footnote" }, "particle_size_um": { "source_ids": [ "3m_overview" ], "locator": "p.11, iM16K row and table headings/footnote" }, "pressure_psi": { "source_ids": [ "3m_overview" ], "locator": "p.11, iM16K row and table headings/footnote" }, "pressure_property": { "source_ids": [ "3m_overview" ], "locator": "p.11, iM16K row and table headings/footnote" }, "survival_percent": { "source_ids": [ "3m_overview" ], "locator": "p.11, iM16K row and table headings/footnote" }, "survival_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, iM16K row and table headings/footnote" }, "pressure_mpa": { "source_ids": [ "3m_overview" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" }, "test_method": { "source_ids": [ "3m_im16k_method" ], "locator": "p.1, Table 1; paper issued 2016-10" }, "density_tolerance_g_cm3": { "source_ids": [ "3m_im16k_method" ], "locator": "p.1, Table 1; paper issued 2016-10" } }, "evidence_status": "historical_supplier_reference" }, { "manufacturer": "3M", "family": "Glass Bubbles", "grade": "iM30K", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": 0.6, "reported_density_g_cm3": 0.6, "density_basis": "True density; table method not stated", "density_tolerance_g_cm3": null, "particle_size_statistic": "D50 by volume (3M QCM193.2)", "particle_size_um": 18, "pressure_psi": 27000, "pressure_mpa": 186.158447, "pressure_property": "particle crush test pressure", "survival_percent": 90, "survival_basis": "Minimum fractional survival in source table", "test_method": null, "source_ids": [ "3m_overview", "3m_compounding", "3m_uk_ks", "local_legacy_particles" ], "source_url": "https://multimedia.3m.com/mws/media/1028330O/3m-glass-bubbles-overview.pdf?fn=3M_Glass_Bubbles_Overview_0919_web_US_R6.pdf", "source_date": "2019-09", "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "2019 supplier overview remains publicly hosted; obtain current lot/specification before procurement.", "Typical values, not specification values.", "Crush test method is not specified in this table; QCM193.2 footnote applies to size, not pressure.", "2019 overview 27,000 psi conflicts with undated UK 28,000 psi / local 193.1 MPa; use versioned observations.", "Undated UK sheet gives D50 by volume 15.3 um under QCM 193.0; 2019 overview gives 18 um under QCM 193.2. Distinct source versions/methods retained; no interchangeable size assumed." ], "alternate_observations": [ { "source_id": "3m_uk_ks", "source_date": null, "access_date": "2026-10-10", "locator": "PDF p.1 pressure/density tables; p.2 size table", "observation_status": "undated_supplier_version", "true_density_g_cm3": 0.6, "density_min_g_cm3": 0.57, "density_max_g_cm3": 0.63, "particle_size_statistic": "D50 by volume (3M QCM 193.0)", "particle_size_um": 15.3, "d10_um": 8.6, "d90_um": 23.6, "pressure_psi": 28000, "pressure_mpa": 193.053204, "minimum_survival_percent": 90, "target_survival_percent": 90 }, { "pressure_mpa": 193.1, "source_id": "local_legacy_particles", "observation_status": "superseded_local_reference", "locator": "iM30K entry", "access_date": "2026-10-10", "source_date": null } ], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "3m:im30k", "model_status": "reference_only", "model_grade_id": null, "review_required": true, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "true_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, iM30K row and table headings/footnote" }, "reported_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, iM30K row and table headings/footnote" }, "density_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, iM30K row and table headings/footnote" }, "particle_size_statistic": { "source_ids": [ "3m_overview" ], "locator": "p.11, iM30K row and table headings/footnote" }, "particle_size_um": { "source_ids": [ "3m_overview" ], "locator": "p.11, iM30K row and table headings/footnote" }, "pressure_psi": { "source_ids": [ "3m_overview" ], "locator": "p.11, iM30K row and table headings/footnote" }, "pressure_property": { "source_ids": [ "3m_overview" ], "locator": "p.11, iM30K row and table headings/footnote" }, "survival_percent": { "source_ids": [ "3m_overview" ], "locator": "p.11, iM30K row and table headings/footnote" }, "survival_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, iM30K row and table headings/footnote" }, "pressure_mpa": { "source_ids": [ "3m_overview" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "historical_supplier_reference" }, { "manufacturer": "3M", "family": "Glass Bubbles", "grade": "H50/10,000 EPX", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": 0.5, "reported_density_g_cm3": 0.5, "density_basis": "True density; table method not stated", "density_tolerance_g_cm3": null, "particle_size_statistic": "D50 by volume (3M QCM193.2)", "particle_size_um": 35, "pressure_psi": 10000, "pressure_mpa": 68.947573, "pressure_property": "particle crush test pressure", "survival_percent": 90, "survival_basis": "Minimum fractional survival in source table", "test_method": null, "source_ids": [ "3m_overview", "3m_h50_rds" ], "source_url": "https://multimedia.3m.com/mws/media/1028330O/3m-glass-bubbles-overview.pdf?fn=3M_Glass_Bubbles_Overview_0919_web_US_R6.pdf", "source_date": "2019-09", "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "2019 supplier overview remains publicly hosted; obtain current lot/specification before procurement.", "Typical values, not specification values.", "Crush test method is not specified in this table; QCM193.2 footnote applies to size, not pressure.", "Full grade suffix matters; mapping legacy bareH50 to this EPX surface-treated grade is unverified." ], "alternate_observations": [], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "3m:h50-10-000-epx", "model_status": "reference_only", "model_grade_id": null, "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "true_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, H50/10,000 EPX row and table headings/footnote" }, "reported_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, H50/10,000 EPX row and table headings/footnote" }, "density_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, H50/10,000 EPX row and table headings/footnote" }, "particle_size_statistic": { "source_ids": [ "3m_overview" ], "locator": "p.11, H50/10,000 EPX row and table headings/footnote" }, "particle_size_um": { "source_ids": [ "3m_overview" ], "locator": "p.11, H50/10,000 EPX row and table headings/footnote" }, "pressure_psi": { "source_ids": [ "3m_overview" ], "locator": "p.11, H50/10,000 EPX row and table headings/footnote" }, "pressure_property": { "source_ids": [ "3m_overview" ], "locator": "p.11, H50/10,000 EPX row and table headings/footnote" }, "survival_percent": { "source_ids": [ "3m_overview" ], "locator": "p.11, H50/10,000 EPX row and table headings/footnote" }, "survival_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, H50/10,000 EPX row and table headings/footnote" }, "pressure_mpa": { "source_ids": [ "3m_overview" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "historical_supplier_reference" }, { "manufacturer": "3M", "family": "Glass Bubbles", "grade": "H50", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": null, "reported_density_g_cm3": null, "density_basis": null, "density_tolerance_g_cm3": null, "particle_size_statistic": null, "particle_size_um": null, "pressure_psi": null, "pressure_mpa": null, "pressure_property": null, "survival_percent": null, "survival_basis": null, "test_method": null, "source_ids": [ "3m_h50_rds" ], "source_url": "https://multimedia.3m.com/mws/mediawebserver?mwsId=SSSSSu9n_zu8l00x4x_ZNxtGOv70k17zHvu9lxtD7xt1evSSSSSS-", "source_date": "2024-01-31", "access_date": "2026-10-10", "verification_status": "legacy_identity_unresolved", "uncertainties": [ "Local model uses shorthand H50; current located quantitative overview names H50/10,000 EPX. Do not silently alias or substitute. Obtain original model/literature grade specification." ], "alternate_observations": [], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "3m:h50", "model_status": "legacy_catalogue", "model_grade_id": "H50", "review_required": true, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": {}, "evidence_status": "unresolved_identity" }, { "manufacturer": "3M", "family": "Glass Bubbles", "grade": "K11", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": 0.11, "reported_density_g_cm3": 0.11, "density_basis": "True density; table method not stated", "density_tolerance_g_cm3": null, "particle_size_statistic": "D50 by volume (3M QCM193.2)", "particle_size_um": 65, "pressure_psi": 200, "pressure_mpa": 1.378951, "pressure_property": "particle crush test pressure", "survival_percent": 80, "survival_basis": "Minimum fractional survival in source table", "test_method": null, "source_ids": [ "3m_overview", "3m_buoyancy_2020" ], "source_url": "https://multimedia.3m.com/mws/media/1028330O/3m-glass-bubbles-overview.pdf?fn=3M_Glass_Bubbles_Overview_0919_web_US_R6.pdf", "source_date": "2019-09", "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "2019 supplier overview remains publicly hosted; obtain current lot/specification before procurement.", "Typical values, not specification values.", "Crush test method is not specified in this table; QCM193.2 footnote applies to size, not pressure." ], "alternate_observations": [], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "3m:k11", "model_status": "reference_only", "model_grade_id": null, "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "true_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, K11 row and table headings/footnote" }, "reported_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, K11 row and table headings/footnote" }, "density_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, K11 row and table headings/footnote" }, "particle_size_statistic": { "source_ids": [ "3m_overview" ], "locator": "p.11, K11 row and table headings/footnote" }, "particle_size_um": { "source_ids": [ "3m_overview" ], "locator": "p.11, K11 row and table headings/footnote" }, "pressure_psi": { "source_ids": [ "3m_overview" ], "locator": "p.11, K11 row and table headings/footnote" }, "pressure_property": { "source_ids": [ "3m_overview" ], "locator": "p.11, K11 row and table headings/footnote" }, "survival_percent": { "source_ids": [ "3m_overview" ], "locator": "p.11, K11 row and table headings/footnote" }, "survival_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, K11 row and table headings/footnote" }, "pressure_mpa": { "source_ids": [ "3m_overview" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "historical_supplier_reference" }, { "manufacturer": "3M", "family": "Glass Bubbles", "grade": "K20HS", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": 0.2, "reported_density_g_cm3": 0.2, "density_basis": "True density; table method not stated", "density_tolerance_g_cm3": null, "particle_size_statistic": "D50 by volume (3M QCM193.2)", "particle_size_um": 60, "pressure_psi": 750, "pressure_mpa": 5.171068, "pressure_property": "particle crush test pressure", "survival_percent": 90, "survival_basis": "Minimum fractional survival in source table", "test_method": null, "source_ids": [ "3m_overview", "3m_buoyancy_2020" ], "source_url": "https://multimedia.3m.com/mws/media/1028330O/3m-glass-bubbles-overview.pdf?fn=3M_Glass_Bubbles_Overview_0919_web_US_R6.pdf", "source_date": "2019-09", "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "2019 supplier overview remains publicly hosted; obtain current lot/specification before procurement.", "Typical values, not specification values.", "Crush test method is not specified in this table; QCM193.2 footnote applies to size, not pressure." ], "alternate_observations": [], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "3m:k20hs", "model_status": "reference_only", "model_grade_id": null, "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "true_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, K20HS row and table headings/footnote" }, "reported_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, K20HS row and table headings/footnote" }, "density_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, K20HS row and table headings/footnote" }, "particle_size_statistic": { "source_ids": [ "3m_overview" ], "locator": "p.11, K20HS row and table headings/footnote" }, "particle_size_um": { "source_ids": [ "3m_overview" ], "locator": "p.11, K20HS row and table headings/footnote" }, "pressure_psi": { "source_ids": [ "3m_overview" ], "locator": "p.11, K20HS row and table headings/footnote" }, "pressure_property": { "source_ids": [ "3m_overview" ], "locator": "p.11, K20HS row and table headings/footnote" }, "survival_percent": { "source_ids": [ "3m_overview" ], "locator": "p.11, K20HS row and table headings/footnote" }, "survival_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, K20HS row and table headings/footnote" }, "pressure_mpa": { "source_ids": [ "3m_overview" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "historical_supplier_reference" }, { "manufacturer": "3M", "family": "Glass Bubbles", "grade": "S32LD", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": 0.29, "reported_density_g_cm3": 0.29, "density_basis": "True density; table method not stated", "density_tolerance_g_cm3": null, "particle_size_statistic": "D50 by volume (3M QCM193.2)", "particle_size_um": 40, "pressure_psi": 1500, "pressure_mpa": 10.342136, "pressure_property": "particle crush test pressure", "survival_percent": 80, "survival_basis": "Minimum fractional survival in source table", "test_method": null, "source_ids": [ "3m_overview" ], "source_url": "https://multimedia.3m.com/mws/media/1028330O/3m-glass-bubbles-overview.pdf?fn=3M_Glass_Bubbles_Overview_0919_web_US_R6.pdf", "source_date": "2019-09", "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "2019 supplier overview remains publicly hosted; obtain current lot/specification before procurement.", "Typical values, not specification values.", "Crush test method is not specified in this table; QCM193.2 footnote applies to size, not pressure." ], "alternate_observations": [], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "3m:s32ld", "model_status": "reference_only", "model_grade_id": null, "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "true_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, S32LD row and table headings/footnote" }, "reported_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, S32LD row and table headings/footnote" }, "density_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, S32LD row and table headings/footnote" }, "particle_size_statistic": { "source_ids": [ "3m_overview" ], "locator": "p.11, S32LD row and table headings/footnote" }, "particle_size_um": { "source_ids": [ "3m_overview" ], "locator": "p.11, S32LD row and table headings/footnote" }, "pressure_psi": { "source_ids": [ "3m_overview" ], "locator": "p.11, S32LD row and table headings/footnote" }, "pressure_property": { "source_ids": [ "3m_overview" ], "locator": "p.11, S32LD row and table headings/footnote" }, "survival_percent": { "source_ids": [ "3m_overview" ], "locator": "p.11, S32LD row and table headings/footnote" }, "survival_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, S32LD row and table headings/footnote" }, "pressure_mpa": { "source_ids": [ "3m_overview" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "historical_supplier_reference" }, { "manufacturer": "3M", "family": "Glass Bubbles", "grade": "XLD3000", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": 0.23, "reported_density_g_cm3": 0.23, "density_basis": "True density; table method not stated", "density_tolerance_g_cm3": null, "particle_size_statistic": "D50 by volume (3M QCM193.2)", "particle_size_um": 30, "pressure_psi": 3000, "pressure_mpa": 20.684272, "pressure_property": "particle crush test pressure", "survival_percent": 90, "survival_basis": "Minimum fractional survival in source table", "test_method": null, "source_ids": [ "3m_overview", "3m_buoyancy_2020" ], "source_url": "https://multimedia.3m.com/mws/media/1028330O/3m-glass-bubbles-overview.pdf?fn=3M_Glass_Bubbles_Overview_0919_web_US_R6.pdf", "source_date": "2019-09", "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "2019 supplier overview remains publicly hosted; obtain current lot/specification before procurement.", "Typical values, not specification values.", "Crush test method is not specified in this table; QCM193.2 footnote applies to size, not pressure." ], "alternate_observations": [], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "3m:xld3000", "model_status": "reference_only", "model_grade_id": null, "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "true_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, XLD3000 row and table headings/footnote" }, "reported_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, XLD3000 row and table headings/footnote" }, "density_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, XLD3000 row and table headings/footnote" }, "particle_size_statistic": { "source_ids": [ "3m_overview" ], "locator": "p.11, XLD3000 row and table headings/footnote" }, "particle_size_um": { "source_ids": [ "3m_overview" ], "locator": "p.11, XLD3000 row and table headings/footnote" }, "pressure_psi": { "source_ids": [ "3m_overview" ], "locator": "p.11, XLD3000 row and table headings/footnote" }, "pressure_property": { "source_ids": [ "3m_overview" ], "locator": "p.11, XLD3000 row and table headings/footnote" }, "survival_percent": { "source_ids": [ "3m_overview" ], "locator": "p.11, XLD3000 row and table headings/footnote" }, "survival_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, XLD3000 row and table headings/footnote" }, "pressure_mpa": { "source_ids": [ "3m_overview" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "historical_supplier_reference" }, { "manufacturer": "3M", "family": "Glass Bubbles", "grade": "S28HS", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": 0.28, "reported_density_g_cm3": 0.28, "density_basis": "True density; table method not stated", "density_tolerance_g_cm3": null, "particle_size_statistic": "D50 by volume (3M QCM193.2)", "particle_size_um": 30, "pressure_psi": 3000, "pressure_mpa": 20.684272, "pressure_property": "particle crush test pressure", "survival_percent": 90, "survival_basis": "Minimum fractional survival in source table", "test_method": null, "source_ids": [ "3m_overview", "3m_buoyancy_2020" ], "source_url": "https://multimedia.3m.com/mws/media/1028330O/3m-glass-bubbles-overview.pdf?fn=3M_Glass_Bubbles_Overview_0919_web_US_R6.pdf", "source_date": "2019-09", "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "2019 supplier overview remains publicly hosted; obtain current lot/specification before procurement.", "Typical values, not specification values.", "Crush test method is not specified in this table; QCM193.2 footnote applies to size, not pressure." ], "alternate_observations": [], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "3m:s28hs", "model_status": "reference_only", "model_grade_id": null, "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "true_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, S28HS row and table headings/footnote" }, "reported_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, S28HS row and table headings/footnote" }, "density_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, S28HS row and table headings/footnote" }, "particle_size_statistic": { "source_ids": [ "3m_overview" ], "locator": "p.11, S28HS row and table headings/footnote" }, "particle_size_um": { "source_ids": [ "3m_overview" ], "locator": "p.11, S28HS row and table headings/footnote" }, "pressure_psi": { "source_ids": [ "3m_overview" ], "locator": "p.11, S28HS row and table headings/footnote" }, "pressure_property": { "source_ids": [ "3m_overview" ], "locator": "p.11, S28HS row and table headings/footnote" }, "survival_percent": { "source_ids": [ "3m_overview" ], "locator": "p.11, S28HS row and table headings/footnote" }, "survival_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, S28HS row and table headings/footnote" }, "pressure_mpa": { "source_ids": [ "3m_overview" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "historical_supplier_reference" }, { "manufacturer": "3M", "family": "Glass Bubbles", "grade": "S38XHS", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": 0.38, "reported_density_g_cm3": 0.38, "density_basis": "True density; table method not stated", "density_tolerance_g_cm3": null, "particle_size_statistic": "D50 by volume (3M QCM193.2)", "particle_size_um": 35, "pressure_psi": 5500, "pressure_mpa": 37.921165, "pressure_property": "particle crush test pressure", "survival_percent": 90, "survival_basis": "Minimum fractional survival in source table", "test_method": null, "source_ids": [ "3m_overview", "3m_buoyancy_2020" ], "source_url": "https://multimedia.3m.com/mws/media/1028330O/3m-glass-bubbles-overview.pdf?fn=3M_Glass_Bubbles_Overview_0919_web_US_R6.pdf", "source_date": "2019-09", "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "2019 supplier overview remains publicly hosted; obtain current lot/specification before procurement.", "Typical values, not specification values.", "Crush test method is not specified in this table; QCM193.2 footnote applies to size, not pressure." ], "alternate_observations": [], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "3m:s38xhs", "model_status": "reference_only", "model_grade_id": null, "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "true_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, S38XHS row and table headings/footnote" }, "reported_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, S38XHS row and table headings/footnote" }, "density_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, S38XHS row and table headings/footnote" }, "particle_size_statistic": { "source_ids": [ "3m_overview" ], "locator": "p.11, S38XHS row and table headings/footnote" }, "particle_size_um": { "source_ids": [ "3m_overview" ], "locator": "p.11, S38XHS row and table headings/footnote" }, "pressure_psi": { "source_ids": [ "3m_overview" ], "locator": "p.11, S38XHS row and table headings/footnote" }, "pressure_property": { "source_ids": [ "3m_overview" ], "locator": "p.11, S38XHS row and table headings/footnote" }, "survival_percent": { "source_ids": [ "3m_overview" ], "locator": "p.11, S38XHS row and table headings/footnote" }, "survival_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, S38XHS row and table headings/footnote" }, "pressure_mpa": { "source_ids": [ "3m_overview" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "historical_supplier_reference" }, { "manufacturer": "3M", "family": "Glass Bubbles", "grade": "S32HS", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": 0.32, "reported_density_g_cm3": 0.32, "density_basis": "True density; table method not stated", "density_tolerance_g_cm3": null, "particle_size_statistic": "D50 by volume (3M QCM193.2)", "particle_size_um": 25, "pressure_psi": 6000, "pressure_mpa": 41.368544, "pressure_property": "particle crush test pressure", "survival_percent": 90, "survival_basis": "Minimum fractional survival in source table", "test_method": null, "source_ids": [ "3m_overview", "3m_buoyancy_2020" ], "source_url": "https://multimedia.3m.com/mws/media/1028330O/3m-glass-bubbles-overview.pdf?fn=3M_Glass_Bubbles_Overview_0919_web_US_R6.pdf", "source_date": "2019-09", "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "2019 supplier overview remains publicly hosted; obtain current lot/specification before procurement.", "Typical values, not specification values.", "Crush test method is not specified in this table; QCM193.2 footnote applies to size, not pressure." ], "alternate_observations": [], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "3m:s32hs", "model_status": "reference_only", "model_grade_id": null, "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "true_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, S32HS row and table headings/footnote" }, "reported_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, S32HS row and table headings/footnote" }, "density_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, S32HS row and table headings/footnote" }, "particle_size_statistic": { "source_ids": [ "3m_overview" ], "locator": "p.11, S32HS row and table headings/footnote" }, "particle_size_um": { "source_ids": [ "3m_overview" ], "locator": "p.11, S32HS row and table headings/footnote" }, "pressure_psi": { "source_ids": [ "3m_overview" ], "locator": "p.11, S32HS row and table headings/footnote" }, "pressure_property": { "source_ids": [ "3m_overview" ], "locator": "p.11, S32HS row and table headings/footnote" }, "survival_percent": { "source_ids": [ "3m_overview" ], "locator": "p.11, S32HS row and table headings/footnote" }, "survival_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, S32HS row and table headings/footnote" }, "pressure_mpa": { "source_ids": [ "3m_overview" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "historical_supplier_reference" }, { "manufacturer": "3M", "family": "Glass Bubbles", "grade": "K42HS", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": 0.42, "reported_density_g_cm3": 0.42, "density_basis": "True density; table method not stated", "density_tolerance_g_cm3": null, "particle_size_statistic": "D50 by volume (3M QCM193.2)", "particle_size_um": 22, "pressure_psi": 7500, "pressure_mpa": 51.71068, "pressure_property": "particle crush test pressure", "survival_percent": 90, "survival_basis": "Minimum fractional survival in source table", "test_method": null, "source_ids": [ "3m_overview", "3m_compounding" ], "source_url": "https://multimedia.3m.com/mws/media/1028330O/3m-glass-bubbles-overview.pdf?fn=3M_Glass_Bubbles_Overview_0919_web_US_R6.pdf", "source_date": "2019-09", "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "2019 supplier overview remains publicly hosted; obtain current lot/specification before procurement.", "Typical values, not specification values.", "Crush test method is not specified in this table; QCM193.2 footnote applies to size, not pressure." ], "alternate_observations": [], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "3m:k42hs", "model_status": "reference_only", "model_grade_id": null, "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "true_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, K42HS row and table headings/footnote" }, "reported_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, K42HS row and table headings/footnote" }, "density_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, K42HS row and table headings/footnote" }, "particle_size_statistic": { "source_ids": [ "3m_overview" ], "locator": "p.11, K42HS row and table headings/footnote" }, "particle_size_um": { "source_ids": [ "3m_overview" ], "locator": "p.11, K42HS row and table headings/footnote" }, "pressure_psi": { "source_ids": [ "3m_overview" ], "locator": "p.11, K42HS row and table headings/footnote" }, "pressure_property": { "source_ids": [ "3m_overview" ], "locator": "p.11, K42HS row and table headings/footnote" }, "survival_percent": { "source_ids": [ "3m_overview" ], "locator": "p.11, K42HS row and table headings/footnote" }, "survival_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, K42HS row and table headings/footnote" }, "pressure_mpa": { "source_ids": [ "3m_overview" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "historical_supplier_reference" }, { "manufacturer": "3M", "family": "Glass Bubbles", "grade": "S42XHS", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": 0.42, "reported_density_g_cm3": 0.42, "density_basis": "True density; table method not stated", "density_tolerance_g_cm3": null, "particle_size_statistic": "D50 by volume (3M QCM193.2)", "particle_size_um": 22, "pressure_psi": 8000, "pressure_mpa": 55.158058, "pressure_property": "particle crush test pressure", "survival_percent": 90, "survival_basis": "Minimum fractional survival in source table", "test_method": null, "source_ids": [ "3m_overview", "3m_buoyancy_2020" ], "source_url": "https://multimedia.3m.com/mws/media/1028330O/3m-glass-bubbles-overview.pdf?fn=3M_Glass_Bubbles_Overview_0919_web_US_R6.pdf", "source_date": "2019-09", "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "2019 supplier overview remains publicly hosted; obtain current lot/specification before procurement.", "Typical values, not specification values.", "Crush test method is not specified in this table; QCM193.2 footnote applies to size, not pressure." ], "alternate_observations": [], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "3m:s42xhs", "model_status": "reference_only", "model_grade_id": null, "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "true_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, S42XHS row and table headings/footnote" }, "reported_density_g_cm3": { "source_ids": [ "3m_overview" ], "locator": "p.11, S42XHS row and table headings/footnote" }, "density_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, S42XHS row and table headings/footnote" }, "particle_size_statistic": { "source_ids": [ "3m_overview" ], "locator": "p.11, S42XHS row and table headings/footnote" }, "particle_size_um": { "source_ids": [ "3m_overview" ], "locator": "p.11, S42XHS row and table headings/footnote" }, "pressure_psi": { "source_ids": [ "3m_overview" ], "locator": "p.11, S42XHS row and table headings/footnote" }, "pressure_property": { "source_ids": [ "3m_overview" ], "locator": "p.11, S42XHS row and table headings/footnote" }, "survival_percent": { "source_ids": [ "3m_overview" ], "locator": "p.11, S42XHS row and table headings/footnote" }, "survival_basis": { "source_ids": [ "3m_overview" ], "locator": "p.11, S42XHS row and table headings/footnote" }, "pressure_mpa": { "source_ids": [ "3m_overview" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "historical_supplier_reference" }, { "manufacturer": "Trelleborg Applied Technologies", "family": "Eccospheres", "grade": "FTD-200", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": null, "reported_density_g_cm3": 0.2, "density_basis": "Average density range per webpage; true-density terminology/method not specified", "density_tolerance_g_cm3": 0.02, "particle_size_statistic": "mean (weighting not specified)", "particle_size_um": 65, "pressure_psi": 750, "pressure_mpa": 5.171068, "pressure_property": "particle isostatic collapse test pressure", "survival_percent": 80, "survival_basis": "80% survival per archival manufacturer sheet; current web footnote omitted", "test_method": "ASTM D3102-78 (archival sheet)", "source_ids": [ "ecco_web", "ecco_2017" ], "source_url": "https://www.trelleborg.com/en/applied-technologies/products-and-solutions/hollow-shell-fillers/eccospheres", "source_date": null, "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "Typical properties only; current vendor confirmation needed for test basis/specification.", "Density is not explicitly labelled true density or accompanied by measurement method." ], "alternate_observations": [], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "trelleborg:ftd-200", "model_status": "reference_only", "model_grade_id": null, "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "reported_density_g_cm3": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, FTD-200 row" }, "density_basis": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, FTD-200 row" }, "density_tolerance_g_cm3": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, FTD-200 row" }, "particle_size_statistic": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, FTD-200 row" }, "particle_size_um": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, FTD-200 row" }, "pressure_psi": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, FTD-200 row" }, "pressure_property": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, FTD-200 row" }, "survival_percent": { "source_ids": [ "ecco_2017" ], "locator": "p.2, FTD-200 row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "survival_basis": { "source_ids": [ "ecco_2017" ], "locator": "p.2, FTD-200 row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "test_method": { "source_ids": [ "ecco_2017" ], "locator": "p.2, FTD-200 row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "pressure_mpa": { "source_ids": [ "ecco_web" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "published_supplier_page" }, { "manufacturer": "Trelleborg Applied Technologies", "family": "Eccospheres", "grade": "FTD-250", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": null, "reported_density_g_cm3": 0.25, "density_basis": "Average density range per webpage; true-density terminology/method not specified", "density_tolerance_g_cm3": 0.02, "particle_size_statistic": "mean (weighting not specified)", "particle_size_um": 55, "pressure_psi": 1200, "pressure_mpa": 8.273709, "pressure_property": "particle isostatic collapse test pressure", "survival_percent": 80, "survival_basis": "80% survival per archival manufacturer sheet; current web footnote omitted", "test_method": "ASTM D3102-78 (archival sheet)", "source_ids": [ "ecco_web", "ecco_2017" ], "source_url": "https://www.trelleborg.com/en/applied-technologies/products-and-solutions/hollow-shell-fillers/eccospheres", "source_date": null, "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "Typical properties only; current vendor confirmation needed for test basis/specification.", "Density is not explicitly labelled true density or accompanied by measurement method." ], "alternate_observations": [], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "trelleborg:ftd-250", "model_status": "reference_only", "model_grade_id": null, "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "reported_density_g_cm3": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, FTD-250 row" }, "density_basis": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, FTD-250 row" }, "density_tolerance_g_cm3": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, FTD-250 row" }, "particle_size_statistic": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, FTD-250 row" }, "particle_size_um": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, FTD-250 row" }, "pressure_psi": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, FTD-250 row" }, "pressure_property": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, FTD-250 row" }, "survival_percent": { "source_ids": [ "ecco_2017" ], "locator": "p.2, FTD-250 row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "survival_basis": { "source_ids": [ "ecco_2017" ], "locator": "p.2, FTD-250 row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "test_method": { "source_ids": [ "ecco_2017" ], "locator": "p.2, FTD-250 row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "pressure_mpa": { "source_ids": [ "ecco_web" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "published_supplier_page" }, { "manufacturer": "Trelleborg Applied Technologies", "family": "Eccospheres", "grade": "SI-100", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": null, "reported_density_g_cm3": 0.1, "density_basis": "Average density range per webpage; true-density terminology/method not specified", "density_tolerance_g_cm3": 0.02, "particle_size_statistic": "mean (weighting not specified)", "particle_size_um": 65, "pressure_psi": 250, "pressure_mpa": 1.723689, "pressure_property": "particle isostatic collapse test pressure", "survival_percent": 80, "survival_basis": "80% survival per archival manufacturer sheet; current web footnote omitted", "test_method": "ASTM D3102-78 (archival sheet)", "source_ids": [ "ecco_web", "ecco_2017" ], "source_url": "https://www.trelleborg.com/en/applied-technologies/products-and-solutions/hollow-shell-fillers/eccospheres", "source_date": null, "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "Typical properties only; current vendor confirmation needed for test basis/specification.", "Density is not explicitly labelled true density or accompanied by measurement method." ], "alternate_observations": [], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "trelleborg:si-100", "model_status": "reference_only", "model_grade_id": null, "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "reported_density_g_cm3": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SI-100 row" }, "density_basis": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SI-100 row" }, "density_tolerance_g_cm3": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SI-100 row" }, "particle_size_statistic": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SI-100 row" }, "particle_size_um": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SI-100 row" }, "pressure_psi": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SI-100 row" }, "pressure_property": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SI-100 row" }, "survival_percent": { "source_ids": [ "ecco_2017" ], "locator": "p.2, SI-100 row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "survival_basis": { "source_ids": [ "ecco_2017" ], "locator": "p.2, SI-100 row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "test_method": { "source_ids": [ "ecco_2017" ], "locator": "p.2, SI-100 row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "pressure_mpa": { "source_ids": [ "ecco_web" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "published_supplier_page" }, { "manufacturer": "Trelleborg Applied Technologies", "family": "Eccospheres", "grade": "SI-160", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": null, "reported_density_g_cm3": 0.2, "density_basis": "Average density range per webpage; true-density terminology/method not specified", "density_tolerance_g_cm3": 0.02, "particle_size_statistic": "mean (weighting not specified)", "particle_size_um": 62, "pressure_psi": 400, "pressure_mpa": 2.757903, "pressure_property": "particle isostatic collapse test pressure", "survival_percent": 80, "survival_basis": "80% survival per archival manufacturer sheet; current web footnote omitted", "test_method": "ASTM D3102-78 (archival sheet)", "source_ids": [ "ecco_web", "ecco_2017" ], "source_url": "https://www.trelleborg.com/en/applied-technologies/products-and-solutions/hollow-shell-fillers/eccospheres", "source_date": null, "access_date": "2026-10-10", "verification_status": "supplier_value_conflict", "uncertainties": [ "Typical properties only; current vendor confirmation needed for test basis/specification.", "Density is not explicitly labelled true density or accompanied by measurement method.", "Current webpage 0.20 g/cc versus archival sheet 0.16 g/cc. Published web value preserved; no silent correction." ], "alternate_observations": [ { "source_id": "ecco_2017", "reported_density_g_cm3": 0.16, "access_date": "2026-10-10", "source_date": null } ], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "trelleborg:si-160", "model_status": "reference_only", "model_grade_id": null, "review_required": true, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "reported_density_g_cm3": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SI-160 row" }, "density_basis": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SI-160 row" }, "density_tolerance_g_cm3": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SI-160 row" }, "particle_size_statistic": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SI-160 row" }, "particle_size_um": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SI-160 row" }, "pressure_psi": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SI-160 row" }, "pressure_property": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SI-160 row" }, "survival_percent": { "source_ids": [ "ecco_2017" ], "locator": "p.2, SI-160 row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "survival_basis": { "source_ids": [ "ecco_2017" ], "locator": "p.2, SI-160 row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "test_method": { "source_ids": [ "ecco_2017" ], "locator": "p.2, SI-160 row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "pressure_mpa": { "source_ids": [ "ecco_web" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "published_supplier_page" }, { "manufacturer": "Trelleborg Applied Technologies", "family": "Eccospheres", "grade": "SI-200", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": null, "reported_density_g_cm3": 0.2, "density_basis": "Average density range per webpage; true-density terminology/method not specified", "density_tolerance_g_cm3": 0.02, "particle_size_statistic": "mean (weighting not specified)", "particle_size_um": 60, "pressure_psi": 800, "pressure_mpa": 5.515806, "pressure_property": "particle isostatic collapse test pressure", "survival_percent": 80, "survival_basis": "80% survival per archival manufacturer sheet; current web footnote omitted", "test_method": "ASTM D3102-78 (archival sheet)", "source_ids": [ "ecco_web", "ecco_2017", "ecco_electronic" ], "source_url": "https://www.trelleborg.com/en/applied-technologies/products-and-solutions/hollow-shell-fillers/eccospheres", "source_date": null, "access_date": "2026-10-10", "verification_status": "supplier_value_conflict", "uncertainties": [ "Typical properties only; current vendor confirmation needed for test basis/specification.", "Density is not explicitly labelled true density or accompanied by measurement method.", "Electronics PDF p.2 lists SI200 nominal 130 kg/m3 versus 200 kg/m3 on webpage and archival sheet; flag vendor-document inconsistency." ], "alternate_observations": [ { "source_id": "ecco_electronic", "reported_density_kg_m3": 130, "access_date": "2026-10-10", "source_date": null } ], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "trelleborg:si-200", "model_status": "reference_only", "model_grade_id": null, "review_required": true, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "reported_density_g_cm3": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SI-200 row" }, "density_basis": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SI-200 row" }, "density_tolerance_g_cm3": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SI-200 row" }, "particle_size_statistic": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SI-200 row" }, "particle_size_um": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SI-200 row" }, "pressure_psi": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SI-200 row" }, "pressure_property": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SI-200 row" }, "survival_percent": { "source_ids": [ "ecco_2017" ], "locator": "p.2, SI-200 row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "survival_basis": { "source_ids": [ "ecco_2017" ], "locator": "p.2, SI-200 row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "test_method": { "source_ids": [ "ecco_2017" ], "locator": "p.2, SI-200 row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "pressure_mpa": { "source_ids": [ "ecco_web" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "published_supplier_page" }, { "manufacturer": "Trelleborg Applied Technologies", "family": "Eccospheres", "grade": "SI-250", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": null, "reported_density_g_cm3": 0.25, "density_basis": "Average density range per webpage; true-density terminology/method not specified", "density_tolerance_g_cm3": 0.02, "particle_size_statistic": "mean (weighting not specified)", "particle_size_um": 60, "pressure_psi": 1800, "pressure_mpa": 12.410563, "pressure_property": "particle isostatic collapse test pressure", "survival_percent": 80, "survival_basis": "80% survival per archival manufacturer sheet; current web footnote omitted", "test_method": "ASTM D3102-78 (archival sheet)", "source_ids": [ "ecco_web", "ecco_2017" ], "source_url": "https://www.trelleborg.com/en/applied-technologies/products-and-solutions/hollow-shell-fillers/eccospheres", "source_date": null, "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "Typical properties only; current vendor confirmation needed for test basis/specification.", "Density is not explicitly labelled true density or accompanied by measurement method." ], "alternate_observations": [], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "trelleborg:si-250", "model_status": "reference_only", "model_grade_id": null, "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "reported_density_g_cm3": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SI-250 row" }, "density_basis": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SI-250 row" }, "density_tolerance_g_cm3": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SI-250 row" }, "particle_size_statistic": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SI-250 row" }, "particle_size_um": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SI-250 row" }, "pressure_psi": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SI-250 row" }, "pressure_property": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SI-250 row" }, "survival_percent": { "source_ids": [ "ecco_2017" ], "locator": "p.2, SI-250 row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "survival_basis": { "source_ids": [ "ecco_2017" ], "locator": "p.2, SI-250 row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "test_method": { "source_ids": [ "ecco_2017" ], "locator": "p.2, SI-250 row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "pressure_mpa": { "source_ids": [ "ecco_web" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "published_supplier_page" }, { "manufacturer": "Trelleborg Applied Technologies", "family": "Eccospheres", "grade": "SID-106Z", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": null, "reported_density_g_cm3": 0.16, "density_basis": "Average density range per webpage; true-density terminology/method not specified", "density_tolerance_g_cm3": 0.02, "particle_size_statistic": "mean (weighting not specified)", "particle_size_um": 60, "pressure_psi": 600, "pressure_mpa": 4.136854, "pressure_property": "particle isostatic collapse test pressure", "survival_percent": null, "survival_basis": null, "test_method": null, "source_ids": [ "ecco_web", "ecco_2017", "ecco_electronic" ], "source_url": "https://www.trelleborg.com/en/applied-technologies/products-and-solutions/hollow-shell-fillers/eccospheres", "source_date": null, "access_date": "2026-10-10", "verification_status": "supplier_grade_identity_conflict", "uncertainties": [ "Typical properties only; current vendor confirmation needed for test basis/specification.", "Density is not explicitly labelled true density or accompanied by measurement method.", "Web grade SID-106Z conflicts with SID-160Z/SID160z in official PDFs. Do not auto-alias or assign historical pressure method across unresolved identity." ], "alternate_observations": [ { "source_id": "ecco_2017", "grade": "SID-160Z", "reported_density_g_cm3": 0.16, "particle_size_um": 60, "pressure_psi": 600, "survival_percent": 80, "test_method": "ASTM D3102-78", "access_date": "2026-10-10", "source_date": null }, { "source_id": "ecco_electronic", "grade": "SID160z", "reported_density_kg_m3": 160, "access_date": "2026-10-10", "source_date": null } ], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "trelleborg:sid-106z", "model_status": "reference_only", "model_grade_id": null, "review_required": true, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "reported_density_g_cm3": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-106Z row" }, "density_basis": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-106Z row" }, "density_tolerance_g_cm3": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-106Z row" }, "particle_size_statistic": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-106Z row" }, "particle_size_um": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-106Z row" }, "pressure_psi": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-106Z row" }, "pressure_property": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-106Z row" }, "pressure_mpa": { "source_ids": [ "ecco_web" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "published_supplier_page" }, { "manufacturer": "Trelleborg Applied Technologies", "family": "Eccospheres", "grade": "SID-200Z", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": null, "reported_density_g_cm3": 0.2, "density_basis": "Average density range per webpage; true-density terminology/method not specified", "density_tolerance_g_cm3": 0.02, "particle_size_statistic": "mean (weighting not specified)", "particle_size_um": 53, "pressure_psi": 1000, "pressure_mpa": 6.894757, "pressure_property": "particle isostatic collapse test pressure", "survival_percent": 80, "survival_basis": "80% survival per archival manufacturer sheet; current web footnote omitted", "test_method": "ASTM D3102-78 (archival sheet)", "source_ids": [ "ecco_web", "ecco_2017" ], "source_url": "https://www.trelleborg.com/en/applied-technologies/products-and-solutions/hollow-shell-fillers/eccospheres", "source_date": null, "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "Typical properties only; current vendor confirmation needed for test basis/specification.", "Density is not explicitly labelled true density or accompanied by measurement method." ], "alternate_observations": [], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "trelleborg:sid-200z", "model_status": "reference_only", "model_grade_id": null, "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "reported_density_g_cm3": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-200Z row" }, "density_basis": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-200Z row" }, "density_tolerance_g_cm3": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-200Z row" }, "particle_size_statistic": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-200Z row" }, "particle_size_um": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-200Z row" }, "pressure_psi": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-200Z row" }, "pressure_property": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-200Z row" }, "survival_percent": { "source_ids": [ "ecco_2017" ], "locator": "p.2, SID-200Z row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "survival_basis": { "source_ids": [ "ecco_2017" ], "locator": "p.2, SID-200Z row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "test_method": { "source_ids": [ "ecco_2017" ], "locator": "p.2, SID-200Z row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "pressure_mpa": { "source_ids": [ "ecco_web" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "published_supplier_page" }, { "manufacturer": "Trelleborg Applied Technologies", "family": "Eccospheres", "grade": "SID-230Z", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": null, "reported_density_g_cm3": 0.23, "density_basis": "Average density range per webpage; true-density terminology/method not specified", "density_tolerance_g_cm3": 0.02, "particle_size_statistic": "mean (weighting not specified)", "particle_size_um": 52, "pressure_psi": 2100, "pressure_mpa": 14.47899, "pressure_property": "particle isostatic collapse test pressure", "survival_percent": 80, "survival_basis": "80% survival per archival manufacturer sheet; current web footnote omitted", "test_method": "ASTM D3102-78 (archival sheet)", "source_ids": [ "ecco_web", "ecco_2017" ], "source_url": "https://www.trelleborg.com/en/applied-technologies/products-and-solutions/hollow-shell-fillers/eccospheres", "source_date": null, "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "Typical properties only; current vendor confirmation needed for test basis/specification.", "Density is not explicitly labelled true density or accompanied by measurement method." ], "alternate_observations": [], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "trelleborg:sid-230z", "model_status": "reference_only", "model_grade_id": null, "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "reported_density_g_cm3": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-230Z row" }, "density_basis": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-230Z row" }, "density_tolerance_g_cm3": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-230Z row" }, "particle_size_statistic": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-230Z row" }, "particle_size_um": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-230Z row" }, "pressure_psi": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-230Z row" }, "pressure_property": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-230Z row" }, "survival_percent": { "source_ids": [ "ecco_2017" ], "locator": "p.2, SID-230Z row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "survival_basis": { "source_ids": [ "ecco_2017" ], "locator": "p.2, SID-230Z row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "test_method": { "source_ids": [ "ecco_2017" ], "locator": "p.2, SID-230Z row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "pressure_mpa": { "source_ids": [ "ecco_web" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "published_supplier_page" }, { "manufacturer": "Trelleborg Applied Technologies", "family": "Eccospheres", "grade": "SID-270Z", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": null, "reported_density_g_cm3": 0.27, "density_basis": "Average density range per webpage; true-density terminology/method not specified", "density_tolerance_g_cm3": 0.02, "particle_size_statistic": "mean (weighting not specified)", "particle_size_um": 50, "pressure_psi": 5000, "pressure_mpa": 34.473786, "pressure_property": "particle isostatic collapse test pressure", "survival_percent": 80, "survival_basis": "80% survival per archival manufacturer sheet; current web footnote omitted", "test_method": "ASTM D3102-78 (archival sheet)", "source_ids": [ "ecco_web", "ecco_2017" ], "source_url": "https://www.trelleborg.com/en/applied-technologies/products-and-solutions/hollow-shell-fillers/eccospheres", "source_date": null, "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "Typical properties only; current vendor confirmation needed for test basis/specification.", "Density is not explicitly labelled true density or accompanied by measurement method." ], "alternate_observations": [], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "trelleborg:sid-270z", "model_status": "reference_only", "model_grade_id": null, "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "reported_density_g_cm3": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-270Z row" }, "density_basis": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-270Z row" }, "density_tolerance_g_cm3": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-270Z row" }, "particle_size_statistic": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-270Z row" }, "particle_size_um": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-270Z row" }, "pressure_psi": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-270Z row" }, "pressure_property": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-270Z row" }, "survival_percent": { "source_ids": [ "ecco_2017" ], "locator": "p.2, SID-270Z row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "survival_basis": { "source_ids": [ "ecco_2017" ], "locator": "p.2, SID-270Z row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "test_method": { "source_ids": [ "ecco_2017" ], "locator": "p.2, SID-270Z row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "pressure_mpa": { "source_ids": [ "ecco_web" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "published_supplier_page" }, { "manufacturer": "Trelleborg Applied Technologies", "family": "Eccospheres", "grade": "SID-311Z", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": null, "reported_density_g_cm3": 0.31, "density_basis": "Average density range per webpage; true-density terminology/method not specified", "density_tolerance_g_cm3": 0.02, "particle_size_statistic": "mean (weighting not specified)", "particle_size_um": 45, "pressure_psi": 6000, "pressure_mpa": 41.368544, "pressure_property": "particle isostatic collapse test pressure", "survival_percent": 80, "survival_basis": "80% survival per archival manufacturer sheet; current web footnote omitted", "test_method": "ASTM D3102-78 (archival sheet)", "source_ids": [ "ecco_web", "ecco_2017", "ecco_electronic" ], "source_url": "https://www.trelleborg.com/en/applied-technologies/products-and-solutions/hollow-shell-fillers/eccospheres", "source_date": null, "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "Typical properties only; current vendor confirmation needed for test basis/specification.", "Density is not explicitly labelled true density or accompanied by measurement method." ], "alternate_observations": [ { "source_id": "ecco_electronic", "source_date": null, "access_date": "2026-10-10", "locator": "p.2 specified values table", "grade": "SID311z / FTD311z", "reported_density_kg_m3": 311, "particle_size_um": 45, "observation_status": "combined_grade_label", "note": "Webpage rounds density to 0.31 g/cc with +/-0.02 range. Electronics sheet lists 311 kg/m3 on a combined label; no grade equivalence inferred." } ], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "trelleborg:sid-311z", "model_status": "reference_only", "model_grade_id": null, "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "reported_density_g_cm3": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-311Z row" }, "density_basis": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-311Z row" }, "density_tolerance_g_cm3": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-311Z row" }, "particle_size_statistic": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-311Z row" }, "particle_size_um": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-311Z row" }, "pressure_psi": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-311Z row" }, "pressure_property": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-311Z row" }, "survival_percent": { "source_ids": [ "ecco_2017" ], "locator": "p.2, SID-311Z row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "survival_basis": { "source_ids": [ "ecco_2017" ], "locator": "p.2, SID-311Z row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "test_method": { "source_ids": [ "ecco_2017" ], "locator": "p.2, SID-311Z row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "pressure_mpa": { "source_ids": [ "ecco_web" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "published_supplier_page" }, { "manufacturer": "Trelleborg Applied Technologies", "family": "Eccospheres", "grade": "SID-350Z", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": null, "reported_density_g_cm3": 0.35, "density_basis": "Average density range per webpage; true-density terminology/method not specified", "density_tolerance_g_cm3": 0.02, "particle_size_statistic": "mean (weighting not specified)", "particle_size_um": 45, "pressure_psi": 6500, "pressure_mpa": 44.815922, "pressure_property": "particle isostatic collapse test pressure", "survival_percent": 80, "survival_basis": "80% survival per archival manufacturer sheet; current web footnote omitted", "test_method": "ASTM D3102-78 (archival sheet)", "source_ids": [ "ecco_web", "ecco_2017" ], "source_url": "https://www.trelleborg.com/en/applied-technologies/products-and-solutions/hollow-shell-fillers/eccospheres", "source_date": null, "access_date": "2026-10-10", "verification_status": "manufacturer_reference_not_prediction_validation", "uncertainties": [ "Typical properties only; current vendor confirmation needed for test basis/specification.", "Density is not explicitly labelled true density or accompanied by measurement method." ], "alternate_observations": [], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "trelleborg:sid-350z", "model_status": "reference_only", "model_grade_id": null, "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "reported_density_g_cm3": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-350Z row" }, "density_basis": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-350Z row" }, "density_tolerance_g_cm3": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-350Z row" }, "particle_size_statistic": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-350Z row" }, "particle_size_um": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-350Z row" }, "pressure_psi": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-350Z row" }, "pressure_property": { "source_ids": [ "ecco_web" ], "locator": "Typical properties table, SID-350Z row" }, "survival_percent": { "source_ids": [ "ecco_2017" ], "locator": "p.2, SID-350Z row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "survival_basis": { "source_ids": [ "ecco_2017" ], "locator": "p.2, SID-350Z row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "test_method": { "source_ids": [ "ecco_2017" ], "locator": "p.2, SID-350Z row and ASTM D3102-78 footnote; historical method, current web footnote absent" }, "pressure_mpa": { "source_ids": [ "ecco_web" ], "locator": "Converted from pressure_psi using pressure_conversion.psi_to_mpa; rounded to 6 decimals" } }, "evidence_status": "published_supplier_page" }, { "manufacturer": "Potters Industries", "family": "Q-CEL", "grade": null, "particle_class": "hollow_glass_microsphere", "record_level": "family_reference", "true_density_g_cm3": null, "reported_density_g_cm3": null, "density_basis": null, "density_tolerance_g_cm3": null, "particle_size_statistic": null, "particle_size_um": null, "pressure_psi": null, "pressure_mpa": null, "pressure_property": null, "survival_percent": null, "survival_basis": null, "test_method": null, "source_ids": [ "potters_web" ], "source_url": "https://www.pottersindustries.com/micro-glass-beads/", "source_date": null, "access_date": "2026-10-10", "verification_status": "current_family_confirmed_grade_properties_missing", "uncertainties": [ "Official family page is not a grade datasheet; numerical grade values withheld.", "Current grade-specific specification requested before quantitative ingestion." ], "alternate_observations": [], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "potters:q-cel", "model_status": "reference_only", "model_grade_id": null, "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": {}, "evidence_status": "family_only" }, { "manufacturer": "Potters Industries", "family": "SPHERICEL", "grade": null, "particle_class": "hollow_glass_microsphere", "record_level": "family_reference", "true_density_g_cm3": null, "reported_density_g_cm3": null, "density_basis": null, "density_tolerance_g_cm3": null, "particle_size_statistic": null, "particle_size_um": null, "pressure_psi": null, "pressure_mpa": null, "pressure_property": null, "survival_percent": null, "survival_basis": null, "test_method": null, "source_ids": [ "potters_web" ], "source_url": "https://www.pottersindustries.com/micro-glass-beads/", "source_date": null, "access_date": "2026-10-10", "verification_status": "current_family_confirmed_grade_properties_missing", "uncertainties": [ "Official family page is not a grade datasheet; numerical grade values withheld.", "Current grade-specific specification requested before quantitative ingestion." ], "alternate_observations": [], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "family_range_only": { "reported_density_g_cm3_min": 0.25, "reported_density_g_cm3_max": 1.1, "reported_max_crush_psi": 10000, "warning": "Family range only; do not pair endpoints as one material or infer survival basis." }, "id": "potters:sphericel", "model_status": "reference_only", "model_grade_id": null, "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": { "family_range_only": { "source_ids": [ "potters_web" ], "locator": "SPHERICEL family description; independent range endpoints, no grade-level pairing" } }, "evidence_status": "family_only" }, { "manufacturer": "Potters Industries", "family": "SPHERIGLASS", "grade": null, "particle_class": "solid_glass_microsphere", "record_level": "family_reference", "true_density_g_cm3": null, "reported_density_g_cm3": null, "density_basis": null, "density_tolerance_g_cm3": null, "particle_size_statistic": null, "particle_size_um": null, "pressure_psi": null, "pressure_mpa": null, "pressure_property": null, "survival_percent": null, "survival_basis": null, "test_method": null, "source_ids": [ "potters_web" ], "source_url": "https://www.pottersindustries.com/micro-glass-beads/", "source_date": null, "access_date": "2026-10-10", "verification_status": "current_family_confirmed_grade_properties_missing", "uncertainties": [ "Official family page is not a grade datasheet; numerical grade values withheld.", "Solid SPHERIGLASS must not enter the hollow-particle syntactic-buoyancy model as an interchangeable grade." ], "alternate_observations": [], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "potters:spheriglass", "model_status": "reference_only", "model_grade_id": null, "review_required": false, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": {}, "evidence_status": "family_only" }, { "manufacturer": "Potters Industries", "family": "SPHERICEL", "grade": "110P8", "particle_class": "hollow_glass_microsphere", "record_level": "grade_reference", "true_density_g_cm3": null, "reported_density_g_cm3": null, "density_basis": null, "density_tolerance_g_cm3": null, "particle_size_statistic": null, "particle_size_um": null, "pressure_psi": null, "pressure_mpa": null, "pressure_property": null, "survival_percent": null, "survival_basis": null, "test_method": null, "source_ids": [ "potters_japan", "potters_sphericel_2012" ], "source_url": "https://www.pqj.co.jp/en/%E4%B8%AD%E7%A9%BA%E3%82%AC%E3%83%A9%E3%82%B9%E3%83%93%E3%83%BC%E3%82%BA", "source_date": null, "access_date": "2026-10-10", "verification_status": "current_grade_identity_historical_properties_only", "uncertainties": [ "Current Japan manufacturer page confirms 110P8 identity, but offers no numerical TDS.", "Historical 2012 manufacturer-authored sheet is distributor-hosted; main numerical fields withheld pending current manufacturer TDS.", "Other historical SPHERICEL grades not promoted to current records without current official grade evidence." ], "alternate_observations": [ { "source_id": "potters_sphericel_2012", "source_date": "2012", "true_density_g_cm3": 1.1, "density_tolerance_g_cm3": 0.05, "density_method": "Gas displacement pycnometer ASTM D2840", "bulk_density_g_cm3": 0.49, "particle_size_statistic": "D50 by volume, laser light scatter", "particle_size_um": 10, "d10_um": 5, "d90_um": 21, "d97_um": 25, "pressure_psi": 10000, "pressure_mpa": 68.947573, "pressure_property": "suggested maximum working pressure", "survival_percent": 90, "survival_basis": "by volume", "test_method": "isostatic inert gas pressure", "access_date": "2026-10-10" } ], "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "id": "potters:110p8", "model_status": "reference_only", "model_grade_id": null, "review_required": true, "literature_links": [], "surface_treatment": null, "lot_id": null, "reviewed_at": "2026-10-10", "field_provenance": {}, "evidence_status": "current_identity_historical_properties" }, { "true_density_g_cm3": null, "reported_density_g_cm3": null, "density_basis": null, "density_tolerance_g_cm3": null, "particle_size_statistic": null, "particle_size_um": null, "pressure_psi": null, "pressure_mpa": null, "pressure_property": null, "survival_percent": null, "survival_basis": null, "test_method": null, "source_url": null, "source_date": null, "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "surface_treatment": null, "lot_id": null, "model_grade_id": null, "id": "potters:q-cel-6014", "manufacturer": "Potters Industries", "family": "Q-CEL", "grade": "6014", "particle_class": "hollow_glass_microsphere", "record_level": "literature_grade_label", "source_ids": [ "local_psp", "potters_web", "potters_qcel_archival" ], "access_date": "2026-10-10", "verification_status": "literature_label_current_grade_unverified", "uncertainties": [ "Found in stored paper extractions. Current availability, exact grade identity and properties need a current manufacturer TDS.", "Literature rows are not automatically model training or independent validation data.", "Historical supplier sheet reports effective liquid-displacement density 0.14 g/cm3 and untamped bulk density 0.08 g/cm3; neither is silently promoted to current true particle density." ], "alternate_observations": [ { "source_id": "potters_qcel_archival", "source_date": null, "access_date": "2026-10-10", "locator": "p.1 typical properties, 6014 column", "observation_status": "historical_supplier_reference", "reported_density_g_cm3": 0.14, "density_basis": "Effective density by liquid displacement; not labelled true density", "bulk_density_g_cm3": 0.08, "bulk_density_basis": "Untamped", "particle_size_um": 85, "particle_size_statistic": "Mean; weighting not stated", "particle_size_min_um": 5, "particle_size_max_um": 200, "note": "Main fields remain unknown pending a current manufacturer grade specification; no pressure or survival value reported." } ], "model_status": "reference_only", "review_required": true, "literature_links": [ { "paper_id": "W1974839170", "stored_rows": 4 }, { "paper_id": "W2728148627", "stored_rows": 24 } ], "reviewed_at": "2026-10-10", "field_provenance": {}, "evidence_status": "unresolved_identity" }, { "true_density_g_cm3": null, "reported_density_g_cm3": null, "density_basis": null, "density_tolerance_g_cm3": null, "particle_size_statistic": null, "particle_size_um": null, "pressure_psi": null, "pressure_mpa": null, "pressure_property": null, "survival_percent": null, "survival_basis": null, "test_method": null, "source_url": null, "source_date": null, "youngs_modulus_gpa": null, "poisson_ratio": null, "foam_strength_mpa": null, "qualified_depth_m": null, "surface_treatment": null, "lot_id": null, "model_grade_id": null, "id": "potters:q-cel-5020", "manufacturer": "Potters Industries", "family": "Q-CEL", "grade": "5020", "particle_class": "hollow_glass_microsphere", "record_level": "literature_grade_label", "source_ids": [ "local_psp", "potters_web" ], "access_date": "2026-10-10", "verification_status": "literature_label_current_grade_unverified", "uncertainties": [ "Found in stored paper extractions. Current availability, exact grade identity and properties need a current manufacturer TDS.", "Literature rows are not automatically model training or independent validation data." ], "alternate_observations": [], "model_status": "reference_only", "review_required": true, "literature_links": [ { "paper_id": "W2766120207", "stored_rows": 10 } ], "reviewed_at": "2026-10-10", "field_provenance": {}, "evidence_status": "unresolved_identity" } ], "required_followups": [ "Obtain current Potters grade-level TDS for Q-CEL 6014/5020 and SPHERICEL grades, including density method, size distribution, surface treatment and pressure/survival protocol.", "Resolve Trelleborg SI-160 and SI-200 density discrepancies and SID-106Z / SID-160Z identity.", "Confirm which 3M specification revision applies to S38HS, S60HS and iM30K particle-size values; older UK QCM 193.0 and 2019 overview QCM 193.2 values differ.", "Resolve original 3M S60 and bare H50 model/literature identities before changing any model parameters.", "Obtain partner recipe/process ranges and independent batch outcomes before expanding model support." ], "model_catalogue_sha256": "40c338ba27e16ccc737cf069e4ac0866145fba7d0c59b44893f99b15ebd96ef6", "unresolved_literature": [ { "label": "Eccospheres (OCR: 'Eccospheres-SI grace of Electroni Co., Belgium')", "paper_id": "W1486780314", "stored_rows": 5, "mapped_supplier_grade_id": null, "reason": "Historical supplier and precise grade unresolved; not evidence for any current Eccospheres grade." } ], "reviewed_at": "2026-10-10", "review_scope": "Source content and identity review. Access/review dates do not establish current availability, lot specifications or model validation. Historical and conflicting observations remain separate." }