(circa 1947 -- use at your own risk)
Julian Smith Pyrocatechin Paper Developer
Pyrocatechin 4 grams
Potassium carbonate 45 grams
Water 900 cc
to this developer, add a trace of bromide (I assume they mean potassium bromide).
(general...
Julian Smith Pyrocatechin Paper Developer
Pyrocatechin 4 grams
Potassium carbonate 45 grams
Water 900 cc
to this developer, add a trace of bromide (I assume they mean potassium bromide).
(general...
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