Quote Originally Posted by NDP_2010 View Post
Thanks for the info. Just following up emulsion softening, i have read dichromate bleach does not soften the emulsion compared to permangenate however both use the same sulfuric acid content and thus wouldnt the pH shift be the same?
Manganese in permanganic acid does not soften anything, chrome in chromium acid crosses-link proteins in the emulsion and harden it. The softening is due to the high pH shift in both cases, the latter being "counteracted" by dichromate.