Ewesly / Holographic Formulae / Potassium Ferricyanide
30 g Potassium Ferricyanide
30 g Potassium Bromide
One litre water
Bleaching time: One and a half times the time it takes to clear.
Temperature: 20C Agitation: Intermittent
For rehalogenation after fixing. The first transmission bleach I was introduced to, however it's best not to bother with because it prints out almost immediately.
Shelf life: This stock solution lasts practically indefinitely.
Source: Integraf Handout, circa late 1970's.