You would have to look at the transparency too. I have seen several of them that were a few years old that were so brittle that you could hardly handle them.
It is an interesting idea to see if you could have one blown up with an enlarger. I would ike to see if that can be done!
most plastics today are made to degrade quickly, don't think I've ever seen archival transparencies. If you have, I would like to get some as well.
Paul Rupp
