I'm working on my Autochrome project, but I realize that I have not yet figured out the reversal processing part of the development procedure. I hav done it a few times, but I'm not entireley familiar with production of the chemicals, which is what I want to do here (I'm not going to spend a lot on the commercial reversal chemicals).

Does anyone have a working formula for a copper sulfate reversal bleach (copper sulfate is the easiest to obtain out of the reversal bleach chemicals)?