Hello gang. I recently just became the new owner of a Eastman View No 1 with six 5x7 film holders. It would appear that each holder is loaded with glass plates that have possibly been exposed. Any suggestions on processing to see if there is anything on them? I currently have access to Diafine, HC110, D76, Dektol, and Quick Silver. Did the old plates develop with a film developer, or a print developer? Thanks for any help you can give.