I recently won an auction for six bottles of Kodak Liquid Developer System Cleaner. As I suspected its the sodium version of the potassium dichromate and sulfuric acid bleach. I took it down to the Dungeon tonight and tried it with the directions from Ed Buffaloes site for reversing film, worked like a charm! Mixes up at a ratio of 10ml to 16oz water, so these six bottles are going to last me quite a while. Now I have a whole new process to learn to control...what fun!