The DARKROOM COOKBOOK, Third Edition

Sodium sulfi te, 23.0 g
*Potassium carbonate, 28.4 g
Potassium bromide, 10% solution, 22.0 ml
Water to make 1.0 liter
Formulas 255
* Substituting sodium carbonate will give a more neutral print tone, and more pleasing color
with some papers. Use 23.4 and 31.5 grams, respectively, of monohydrate in place of the potassium
salt.
Mix the stock solutions in the following proportions to give a progressive range of contrasts.
Contrast Low Normal High
Solution No. 1 2 3 4 5 6 7
Parts of A 8 7 6 5 4 3 2
Parts of B 0 1 2 3 4 5 14
Parts water 8 8 8 8 8 8 0
The lower contrast solutions can be diluted with water for even softer contrast. Use normal
development times of 2 to 3 minutes but with less agitation.
Warm-Tone Developers
FORMULA #91
Agfa 120
Brown-Tone Paper Developer
This developer will produce a variety of brown to warm black tones on various papers,
depending on dilution and exposure time.
Water at 125F/52C, 750.0 g
Sodium sulfi te, 60.0 g
Hydroquinone, 24.0 g
Potassium carbonate, 80.0 g
Water to make 1.0 liter
Development
Tone Desired Exposure Time Dilution Time at 68F/20C
Warm-black Normal 1:5 4–5 minutes
Brown-black 1½ � longer than normal 1:4 3 minutes