Wow, this is great. Thanks for the details and sources you have provided.
I’m going to look into the possibility of using this method in printing / embossing projects.
One of the projects I will pursue is determining if I can cut photopolymer plates with my GF and let the plate harden by exposure to sunlight instead of making negatives exposing the photopolymer plates to UV light and “developing “with water (complicated process) so, your method sure looks like what I’m looking for.
I’m wondering if the plates would tolerate printing ink - and cleaning agents like karosene or trisodium phosphate ( used to clean lead type)
I hope to assemble my window vent by tomorrow and Use my new GF.