Another half roll ruined... tonight I've tried to reverse half roll of T-Max 100 (@50). I've souped it following the regular b&w reversal process but using a copper sulfate based bleach instead. The bleach was composed of 10g/l of copper sulfate and 50g/l od sodium bisulfate (as can be seen at http://www.a1.nl/phomepag/markerink/hieslide.htm) Results: disaster! The film came out solid black: I'm guessing the bleach stage didn't functioned at all. I guess that's why people at Kodak and at Photographer's formulary, not considering the dr5.com, don't use copper sulfate as a bleach agent: because IT DOESN'T WORK! Sh.., I must go with something tried and true because second-guessing or trusting someone who doesn't give a clue to what a reversal process is is beginning to be costly. At least for me, YMMV.