In my various reading, I have come across a couple of how-to's for toning or dyeing darkroom prints with organic substances: coffee, tea, red wine, food coloring, etc. Has anyone ever done this? What kind of results did you get? I also have concerns about the effects on the archival stability of the print. Wouldn't an organic substance contain enough acids or other unwanted elements that would accelerate print deterioration? :scratch: I don't see much written on that aspect of it.