Ewesly / Holographic Formulae / JD-4 Kit
35 g Copper Sulfate
5 g Sodium Bisulfate
100 g Potassium Bromide
One litre water
Bleaching time: One and a half times the time it takes to clear.
Temperature: 20C Agitation: Intermittent
More or less the same as the original Jeff Blyth's original Copper Sulfate Bleach, again subbing a dry powder to save on hazardous shipping charges of liquid acetic acid.
Shelf life: Pleasant blue-green color when mixed, dirty green when exhausted. Not prone to oxidation like PBQ.
Source: <a href="04-3040.pdf" title="JARB" target="_new">Photographers' Formulary JD-4 (JARB) Holography Processing Kit Instructions</a>