I am purchasing a PLA/ABS/etc. 3D printer for various projects and a friend asked me to make a Jell-O mold. I am aware that PLA degrades into harmless lactic acid and there are Food Grade varieties for purchase but that isn't the only issue. There are other potential issues such as contaminates from the printing device (maybe from the metal or remnants of other plastics) and bacterial growth in the rough surface of the plastic. That being said, one internet article from 3 years ago is probably not complete.
For cookie cutters (no friend; I want those), I intend to try putting aluminum foil or saran wrap on the cutting part. This would decrease any detail of a Jell-O mold but it might be the correct direction to go.
Is there food safe way to print cooking tools intended for repeated use at low temperatures to moderate temperatures without a printer specifically designed to be food safe? If I am not comfortable my tool is food safe (say it needs to be ABS or bright purple), is there a way I can permanently or temporarily coat such a tool to make it food safe without sacrificing excessive amounts of detail or functionality?