[holmburgers]

Can anyone reading this thread explain the chemistry of clearing these prints, especially the role of the potassium permanganate? For reference, the formula can be found here.

--Greg

+1

----------------

Inkjet papers contain dye mordants much like dye-transfer paper, which is what I transferred a q&d Ultrastable test to. Like your experience, a brown stain appeared in the next couple hours.

I have seen these compounds (diazo/azido) referred to as dyes before.

If your fixed-out FB paper was treated in a hardening fixer containing chrome alum or the like, you could expect this to have a mordanting effect as well, though significantly lower. It therefore might be interesting to observe what happens with photo-paper that was fixed out in a non-hardening fixer.