Selling filament into US retail — marketplaces, hobby chains, education catalogs — pulls the product into consumer-safety expectations that industrial filament never faces. The two frameworks that come up most are CPSIA and California Proposition 65.
CPSIA in one paragraph
The Consumer Product Safety Improvement Act sets limits for children's products, most visibly on lead and certain phthalates. Whether your SKU is in scope depends on who the product is intended for. Filament marketed to children — bright color ranges, "kids" branding, school kits — invites the question far more than filament sold as a workshop material.
Prop 65 logic
California's Proposition 65 requires a warning when a product exposes a consumer to a listed chemical above the applicable threshold. It is not a product ban: it is a disclosure regime. In practice, suppliers either provide testing evidence that exposure is below the threshold or apply a warning label. Both routes exist; the wrong route is ignoring the question.
Preparing a retail-ready file
| Document | What it answers |
|---|---|
| Lead and phthalate test report | Whether the grade meets the limits the channel applies |
| Prop 65 statement or warning decision | How the SKU is handled for California |
| Restricted-substances declaration | General chemical position across the range |
| Material safety data sheet | Handling, storage and transport information |
| Age-suitability statement | Whether the product is intended for children — this drives CPSIA scope |
Design decisions that reduce compliance cost
- Position the SKU honestly. Filament sold as a workshop material for adults carries a different expectation than filament branded for children.
- Keep one color family per test. Testing every color separately multiplies cost; standardise the masterbatch families you sell.
- Retain samples. If a query arrives two years later, a retained spool plus its batch report answers it.
- Write the claim correctly. "Lead and phthalate tested" describes what happened; "CPSIA certified" usually does not.
How this fits with EU documentation
A supplier serving both markets should hold EU-side documents (RoHS/REACH declarations, declaration of conformity) and US-side consumer documentation (CPSIA/Prop 65) for the same grades. VOXFIL supplies both sets: RoHS and REACH declarations, EU and US declarations of conformity, CPSIA/CA65 documentation covering lead and nine phthalates for consumer SKUs, plus TDS, SDS and lot-level batch reports. Request the current revisions via the Trust Center.
Frequently asked questions
Does filament need CPSIA testing?
It depends on whether the product is intended for children. Filament marketed to children falls closer to CPSIA scope, which sets lead and phthalate limits. Workshop-oriented filament is usually assessed differently, but US retail channels often request the test data regardless.
What is California Prop 65 for filament?
A disclosure regime: if a product exposes consumers to a listed chemical above the applicable threshold, a warning is required. Suppliers either provide test evidence or apply a warning. Confirm the approach with your own compliance advisor.
What documentation should a US retail-ready filament SKU have?
Lead and phthalate test reports, a Prop 65 position or warning decision, a restricted-substances declaration, an SDS for the grade, and a clear statement of intended age group.