I heard about caffenol some time ago … a developer soup made from coffee, vitamin c and washing soda! For black & white negative processing, film as well as paper.
Tonight was my night!
I bathed a double super 8 test stripe (Fomapan R) in a smelly brownish soup for 15 minutes (then regular fixing) and what came out?
A fully developed warm black tone quite dense negative! Hoooray!
Developer to drink, developer to go, developer to flush in the toilet, no more chemicals any more (except fix, but maaayyybeeee there’s a chance with salt, I’m following a forum discussion about that subject and I guess I must check it out …)
Here’s a lovely caffenol blog and here another one!