We all know about diy black and white developers like caffenol,

Short answer: no.
Medium answer: Using some hair dye you get something that couples a single dye layer of the three or something. No full colour.
Long answer: You can mix up any chemical mixture if you have the ingredients. C41 dye couplers just happen to be difficult to obtain and very expensive for an average consumer. If you work in an appropriate industry or know someone who does or want to be prepper-tier self-sustainable you can buy and mix your own colour dev. Prohibitively expensive and difficult if weighing stuff or doing basic math scares you.

>>2903058
Кypвa do you have/did you make a DIY fixer tutorial?

I have your tutorial on B&W developer.

>>2903212
The active ingredient in fixer is usually sodium thiosulphate (aka hypo) or ammonium thiosulphate. If you want a nigger rigged recipe, ammonium thiosulphate is an ingredient of some fertilizers, although I'm not sure about the keeping properties of film fixed in a fertilizer.

>>2903041
>a team of 1 developing a substitute for CD4 in their basement
Oh boy.

>>2903041
this meme needs to die!