OK, I will look up the C-41 formula and see how much Soldium Sulfite will be needed. It is a cheap chemical and easy to get. The hard part will be adjusting PH without a PH meter. Actually I have one but the probe is shot. I tried to learn how to use one and found it not so trivial to calibrate it. I also got test strips but the accuracy will be questionable. Any tips for adjusting PH without a PH meter? Thanks a lot, PE.