Under Tested’s Fuse 1 demo, one viewer asked it in six words: “Can you print medical grade parts?” Nobody replied. It’s a question bureaus get every month from people making braces, guides and device housings, and “biocompatible PA12” on a datasheet answers less of it than people assume.
Is biocompatible PA12 good enough for medical parts?
For some uses, yes, but the powder’s test results don’t certify your part. HP’s datasheet for HP 3D High Reusability PA 12 says the powder and its fusing and detailing agents meet USP Class I–VI and the US FDA’s guidance for intact skin surface devices. HP lists the tests: irritation, acute systemic toxicity and implantation under USP, cytotoxicity per ISO 10993-5, and sensitization per ISO 10993-10. That’s based on HP internal testing from June 2017.
Formlabs’ Nylon 12 datasheet lists its own set under ISO 10993-1: not cytotoxic, non-irritant, not a sensitizer, no evidence of systemic toxicity, and non-pyrogenic.
So what’s the catch?
Responsibility. HP’s footnote says plainly that it’s the customer’s job to determine that the material is safe and suitable for the intended use, and that it meets the regulatory requirements, FDA included, for the final product. The datasheet covers the material as HP tested it. Your part goes through your own powder handling, refresh ratio, post-processing and cleaning before it reaches a patient.
Notice the scope too. HP’s FDA reference is for intact skin. A brace strap or a cast fits that. Something that goes inside the body is a very different claim, and nothing on these datasheets says otherwise.
Does the material choice change it?
Yes, so check each powder separately. Formlabs’ Nylon 11 CF page, for example, lists skin contact and mucosal membrane contact. Don’t assume a filled or colored version of a powder carries the base grade’s results.
What should a bureau do before quoting?
Keep the datasheet results on file, but quote the job as material only, not as a medical device. Ask the customer who owns regulatory sign-off, and write that name on the order. Then lock the process: same powder, same refresh ratio, same finishing. Changing any of them later changes what you’d have to re-justify.
Related on the Solvi blog: MJF vs SLS Parts: What Should a Bureau Tell Customers?; PA11 vs PA12 on MJF: When Is PA11 Worth Running?; SLS Nylon Yellowing: Why White Parts Turn Yellow.
Sources: YouTube: Formlabs Fuse 1 demo (Tested), viewer question; HP 3D High Reusability PA 12 datasheet (PDF); Formlabs Nylon 12 Powder technical data sheet; Formlabs Nylon 11 CF Powder.