For those who may be interested in trying a Pyrogallol paper developer, I am posting the latest formula that I have been working with.
43 gm Sodium Sulfite
.3 gm Phenidone
10 gm Catechol
5 gm Pyrogallol
3.5 gm Potassium Bromide
50 gm Sodium Carbonate
Water to make 1 liter
Dilute 1-1 to make 2 liters of use solution
The Phenidone is most easily dissolved in alcohol. It is strongly advised to use eye, respiratory and hand protection when working with Pyrogallol just as in any pyro formulation.
I would appreciate feedback if you decide to use this formulation
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