Lately I've been having fun using some really old Kodabromide paper that I picked up at Goodwill. I haven't even bothered to put it in any chemicals, but after leaving it in an easel for a couple weeks I noticed that it was starting to darken. So naturally, I set it outside in the sun and in no time it was this rich burgundy color. The next logical step was to put it in a contact frame with some transparencies... etc. Anyways, the prints I've gotten have a really great look to them and aside from scanning them, it'd be fun to fix them for preservation. As it is, I guess I have a host of questions.... Namely, is fixation possible? Also, are there modern papers that would exhibit this phenomenon? Weren't the classic POP (print out papers) primarily one halide over the others? Which one? How are/were POP fixed? Thanks!