All of the exotic catalysts will work. The 2, 3 Dimethyl quinoxaline is what Ilford uses AFAIK. I am intending to design my color material (If I ever go it) around Phenazine probably. IDK.

All of the above are rather toxic and should be handled carefully and all DB bleaches are similar. They are about pH 1 or so, have HCl or H2SO4 in them, Thiourea, NH4Br, and other things. Recent DB bleaches use Sulfamic Acid with the same low pH.

You must used a support such as YUPO or RC, as the bleach destroys most papers.

PE