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Ewesly / Holographic Formulae / Potassium Ferricyanide

Revision as of 22:26, 18 February 2014 by Jsfisher (talk | contribs) (Created page with "== Bleach solution == <p> 30 g Potassium Ferricyanide<br /> 30 g Potassium Bromide<br /> One litre water</p> == Processing == <p><u>Bleaching time:</u> One and a half ti...")
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Bleach solution

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.