Advice/info needed: What are these, and how can I physically clean & handle without damaging them?
Advice/info needed: What are these, and how can I physically clean & handle without damaging them? Hi all, it's my first time posting here or working with photographs. I've acquired 75 of these negative/slide-projector looking images that are individually sealed with tape between two glass panels. 1 of the images is in a metal container that's different from the rest. My goal is to use these in an art project somehow, but the specifics will...