Quote Originally Posted by afrank View Post
Do not fix them, and depending on the light conditions perhaps residues could darken it instead of making it fade....
Yes that is what would happen; the undeveloped silver would slowly darken, especially under UV to green light. you could also fix them but don't rinse, which would give you a brown stain as the silver slowly converts to silver sulphide. If you have a brightly-lit space, you could print with a non-analogue ink-squirter using cheap dye-based inks which quickly fade in bright light; done this way the colour balance would alter as the inks degrade at different rates. But you didn't hear that from me on APUG...

Cheers,
kevs