Caffenol

Some of my fellow members in the photo club are very inclined to use instant coffee when they develop film. Not to drink while developing, but actually soak the film in a mixture containing instant coffee. The negatives does not turn dark brown but seems actually alright when finished. I have my doubt that coffee is the real working component in the mixture but something else. Until proven I think coffee is just a blind and fun part of the recipe.

Recipy study

Multiple conversations

I'll stick with my ususal developer for a while longer.