Photo Engineer said:... and print them on my own version of Ilfochrome. That would probably be the only color material that could be coated in a home darkroom with any chance of success.
PE
Don't forget tricolor gum bichromate or 3-color carbro.

Then there's also wetplate collodion for the monochrome negatives/positives and various alternative print processes (salted paper, albumen, van dyke, PT/Pd, cyanotype, etc.).
Joe

