Would using a cured 3D printed Resin buck be ok for foodsafe vacuum forming if the mold plastic is food safe?

I'm trying to make chocolate molds and I had the idea to use a resin 3D printer to print then fully cure resin bucks to use on a thermoforming machine to create the molds with food safe PET plastic. I just want to make sure this is actually food safe instead of just looking food safe.

To be clear: it would be printed with nonfood safe fully cured resin then act as a buck for a vacuum forming machine that will use food safe plastic. Would the resulting mold be food safe?

The only real result I'm finding is from https://formlabs.com/blog/custom-chocolate-molds-3d-printing-vacuum-forming/ but I want an actual answer that isn't from someone who has a financial interest in me buying their product.