{"hq_id":"hq-p-spe-000100","name":"Stained Glass and Lead Soldering (Hobbyist Lead Exposure)","category":{"primary":"specialty","secondary":"craft","tags":["stained glass","lead solder","lead came","flux","hobbyist","blood lead","ventilation"]},"product_tier":"SPE","overall_risk_level":"high","description":"Stained glass crafting using lead came (H-channel strips) and 60/40 or 50/50 lead-tin solder. Flux fumes (zinc chloride, oleic acid) are respiratory irritants. Lead exposure from handling came, soldering (lead fume at 450C+), and accumulated lead dust on work surfaces. Hobby stained glass workers have measurably elevated blood lead levels (CDC). Lead-free alternatives exist but are less traditional. Hand-washing after work is critical — lead transfers to food and children via contaminated hands.","synthesis":{"derived_risk_level":"severe","synthesis_confidence":0.744,"synthesis_method":"compound_composition","context_used":"human_adult","context_source":"product_users","exposure_modifier":1.1,"vulnerability_escalated":false,"escalation_reason":null,"compounds_resolved":1,"compounds_total":1,"synthesis_date":"2026-05-09","synthesis_version":"1.2.0","methodology_note":"exposure_modifier and adjusted_magnitude are computed from ALETHEIA-calibrated heuristics (route × duration × frequency multipliers, clamped to [0.5, 1.4]). Multipliers are directionally informed by EPA Exposure Factors Handbook (2011) and CalEPA OEHHA but are not regulatory consensus. See /api/methodology for full disclosure."},"hazard_summary":{"sensitive_populations":"hobbyists, children in hobbyist's home (take-home lead)","overall_risk":"high","primary_concerns":["Lead has no safe exposure level — hobby workers have elevated blood lead","Take-home contamination to children via clothing, hands, surfaces","Lead fume from soldering at 450C+ (below this temperature: particulate lead)","Lead dust accumulation on all work area surfaces"],"exposure_routes":"Inhalation (lead fume/particulate); oral (hand-to-mouth); dermal (handling)"},"exposure":{"routes":["inhalation","oral","dermal"],"contact_types":["inhalation","oral_direct","skin_brief"],"users":["adult"],"duration":"hours","frequency":"weekly","scenarios":["Lead fume inhalation during soldering (solder melts at 183-190C, vaporizes above 450C)","Dermal lead absorption from handling came and solder","Hand-to-mouth lead transfer to food and children","Lead dust accumulating on work surfaces, tools, clothing"],"notes":"CDC: hobby stained glass workers have measurably elevated blood lead. Lead has no safe exposure level. Wash hands thoroughly before eating, drinking, or touching children. Do not eat/drink in work area. Change clothes after working. Consider lead-free solder (97/3 tin/copper) and copper foil technique (Tiffany method) to reduce lead exposure. Local exhaust ventilation at soldering station captures fume."},"consumer_guidance":{"usage_warning":"Wash hands IMMEDIATELY after stained glass work — before touching anything else. Change clothes before interacting with children. Work in dedicated area (not kitchen table). Use local exhaust ventilation at solder station. Consider lead-free solder and copper foil technique. Never eat/drink in work area. Test blood lead annually if regular hobbyist.","safer_alternatives":["Lead-free solder (97/3 tin/copper — less flow but eliminates lead)","Copper foil (Tiffany) technique instead of lead came","Local exhaust ventilation at soldering station","Dedicated work area separate from living space"],"red_flags":[{"indicator":"Working without ventilation or respiratory protection","meaning":"Chemical exposure at hobby level can cause occupational-grade health effects.","action":"Use ventilation and PPE appropriate to the specific hazard."}],"green_flags":[{"indicator":"Using appropriate PPE and ventilation for the specific task","meaning":"Exposure controlled to safe levels.","verification":"Match PPE to specific hazard (N95 for dust, organic vapor for solvents, supplied air for isocyanate)."}],"what_to_ask":[{"question":"What are the specific chemical hazards of this hobby material?","why_it_matters":"Hobby exposures lack occupational protections but cause the same health effects.","good_answer":"SDS available, specific PPE identified, ventilation plan in place.","bad_answer":"No hazard awareness or PPE use."}],"alternatives":[{"name":"Lead-free solder","notes":"97/3 tin/copper — less flow but eliminates lead"},{"name":"Copper foil","notes":"Tiffany) technique instead of lead came"},{"name":"Local exhaust ventilation at soldering station","notes":"Alternative"}]},"regulatory":{"applicable_regulations":[{"jurisdiction":"USA","regulation":"OSHA Lead Standard (General Industry)","citation":"29 CFR 1910.1025","requirements":"PEL: 50 μg/m³ TWA. Action level: 30 μg/m³. Blood lead monitoring at action level. Applies to workplaces, not home hobbies — but health effects are the same.","compliance_status":null,"effective_date":null,"enforcing_agency":"OSHA","penalties":null,"source_ref":null}],"certifications":[],"labeling":{"required_disclosures":[],"prop65_warning":{"required":null,"chemicals":[],"endpoint":null,"notes":null},"ghs_labeling":{"required":null,"signal_word":null,"pictograms":[],"hazard_statements":[],"notes":null},"hidden_ingredients":{"trade_secret_protected":null,"categories_hidden":[],"estimated_count":null,"known_concerns":null,"notes":null},"notes":null},"recalls":[],"regulatory_gap":null,"notes":null},"lifecycle":{"recyclable":true,"disposal_guidance":"Lead scraps: collect for scrap metal recycling. Do not put in regular waste.","hazardous_waste":true,"expected_lifespan":"varies"},"formulation":{"form":"varies","key_ingredients":[{"hq_id":"hq-c-ino-000001","name":"Lead (Pb)","role":"solder_came_material","concentration_pct":"50-60 of solder/came"}],"certifications":[]},"materials":{"common":[],"concerning":[],"preferred":[]},"compound_composition":[{"hq_id":"hq-c-ino-000001","compound_name":null,"role":"solder_came_material","typical_concentration":"50-60% of solder/came"}],"identifiers":{"common_names":["stained glass and lead soldering (hobbyist lead exposure)"],"aliases":[],"manufacturer":null,"brands":[]},"brand_examples":[{"brand":"Federal Premium","manufacturer":"Vista Outdoor","market_position":"mass_market","notable":"Leading ammunition brand"},{"brand":"CCI/Speer","manufacturer":"Vista Outdoor","market_position":"mass_market","notable":"Popular ammunition manufacturer"},{"brand":"Fiocchi","manufacturer":"Fiocchi Munizioni","market_position":"premium","notable":"Premium ammunition brand"}],"brand_examples_disclaimer":"Representative branded products of this category. Concerning ingredients listed in materials.concerning[] apply to the category, not necessarily to every named brand. Specific formulations vary by SKU and may have changed since this record was written; consult the brand's current ingredient label before drawing brand-level conclusions.","sources":[{"type":"expert_curation","name":"ALETHEIA Safety Database","date":"2026-03-25"},{"type":"regulation","title":"OSHA Lead Standard (General Industry) (29 CFR 1910.1025)","jurisdiction":"USA","citation":"29 CFR 1910.1025","id":"src_8ff847cb"},{"id":"src_001","type":"cdc","title":"CDC - Lead Poisoning Prevention","url":"https://www.cdc.gov/lead-prevention/","accessed":"2026-01-13","relevance":"Blood lead reference values, no safe level doctrine","inherited_from_compound":"hq-c-ino-000001"},{"id":"src_002","type":"who","title":"WHO - Lead Poisoning Fact Sheet","url":"https://www.who.int/news-room/fact-sheets/detail/lead-poisoning-and-health","year":2024,"accessed":"2026-01-13","relevance":"Global burden statistics, health effects","inherited_from_compound":"hq-c-ino-000001"},{"type":"report","title":"US Centers for Disease Control and Prevention (CDC)","jurisdiction":"USA","id":"src_08f06b18","extraction":"description_reference"}],"meta":{"schema_version":"4.0.0","last_updated":"2026-03-25","timestamp":"2026-05-14T01:22:37.507Z"}}