Apparently there is information out there! I was going with the plan to make my own silk screens based on my designs and did searches on 'how to make food safe silk screens' to no avail, but I just did another search and find someone who sells the silk screens with designs on them already, if you are interested in that. Here is a link, if that helps:
https://www.facebook.com/Gatea...directed_target_id=0
They really do wonderful work!