I have been doing a bit of reading of if 3D printing is food safe. One of the issues I run across is even if the plastic is safe the ridges will collect food particals and therefore bacteria. So I have been looking for a coating that would be good safe and work on plastics. Any recommendations?
One approach - for home use rather than the FDA - would be: Stainless Steel nozzle (no lead) ColorFabb XT(compliant as mentioned above) Sand parts and smooth with blow torch (Richrap's method with PETG parts) You can smooth XT with nasty solvents but Sanjay has lectured us against this for reasons ranging from finger safety to Parkinsons. Still, if you have a fume cupboard and are determined.... Popular coatings include XTC-3d: the difficulty is finding one that's food safe. Another approach is to use the 3d print (having first smoothed it) to create a mould and then to form something out of food safe plastic.
Ah, mostly worried about the inside where it is difficult/impossible to sand/torch, I was hoping there was some sort of resin that was easy to spread like an epoxy coating on wood. Thanks for the replies
There are epoxies for water tanks for drinkable water. Don't know if these would work on the printed plastic. The first one I found. Its even Norwegian http://www.jotun.com/my/en/b2b/paintsandcoatings/products/tankguard-dw.aspx
I don't know if this helps, but PEEK can be annealed, a bit like metal: http://www.plasticsintl.com/documents/PEEK Annealing.pdf
