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Greetings, I've been 3D printing some frames you can download from glassesusa.com/3D. I'm printing them with a PA 12 (Nylon 12) MultiJet Fusion powder based system from HP. The frames come out a nice satin matte black finish and can be polished or tumble finished to a semi-gloss. I'm looking for a clear coat spray paint or dip coating to apply. Is there any "skin contact" safe material that is commonly used for this application?
HP 3D High Reusability
PA 12Strong, lowest cost,1 quality parts
Produce strong, functional, detailed complex parts
• Robust thermoplastic produces high-density parts with balanced property profiles and strong structures.
• Provides excellent chemical resistance to oils,greases, aliphatic hydrocarbons, and alkalies.2
•Ideal for complex assemblies, housings,enclosures, and watertight applications.
• Biocompatibility certifications—meets USP Class I-VI and US FDA guidance for Intact Skin Surface Devices.3Q
read all of it:
http://h20195.www2.hp.com/v2/getpdf....A6-4895EEP.pdf
What about shellac? There are food-grade types of that.
Just found one that also uses Shellac:
Studio Under's new extruder design could 3D print plastic granulate AND natural resin Shellac
See at:
http://www.3ders.org/articles/201501...lac-resin.html