Ewesly / Holographic Formulae / Potassium Ferricyanide

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Bleach solution

30 g Potassium Ferricyanide
30 g Potassium Bromide
One litre water

Processing

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.

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