Julian Smith Pyrocatechin Paper Developer

Kino · Oct 28, 2006

Kino submitted a new resource:

(there was a url link here which no longer exists) - Julian Smith Pyrocatechin Paper Developer

(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 info attached to this formula) Pyrocatechin is a developer which gives beautiful brown tones upon bromide papers. It is somewhat tricky, as its best effect is secured by using it at a temperature of about 100 degrees F with greatly abbreviated...

(there was a url link here which no longer exists)

Sean · Oct 28, 2006

Comments from the previous article system:

By Ian Grant - 11:22 PM, 05-10-2006 Edit Rating: None
Modern papers have good pre-hardened emulsions so the high temperature will not present a problem. I normally use warm toned developers at at a little over 37 centigrade, 100 F, to keep extended dev times to a minimum and acquire greater warmth.

In the case of this dev its about keeping times short to prevent aerial oxidation of the Pyrocatechin, the oxidised dev can stain the paper base/emulsion.

Julian Smith Pyrocatechin Paper Developer

Kino

Sean

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