The DARKROOM COOKBOOK, Third Edition

304 THE DARKROOM COOKBOOK
FORMULA #174
Kodak R-14
Non-staining Reducer
Farmer’s reducer can cause a brownish stain with some papers. This problem can often
be avoided by adding a small quantity of potassium iodide to the fi nal print fi xing bath. If
the brownish residual stain still persists, a non-staining reducer should be used instead of
Farmer’s.
SOLUTION A
Water, 500.0 ml
Thiourea, 15.0 g
Sodium thiosulfate, crystalline, 700.0 g
Water to make 1.0 liter
SOLUTION B
Water, 200.0 ml
Potassium ferricyanide, 75.0 g
Water to make 250.0 ml
Add 14 parts water to 5 parts of Solution A and then add 1 part of Solution B. The resulting
solution can be diluted again (1:1) to produce a convenient working concentration.
FORMULA #175
Print Rehalogenating Bleach
Use this bleach to convert all silver metal to silver bromide in a print prior to using the redevelopment
method of toning (Chapter 8, Printing Methods and Techniques: Redevelopment
Method). After rehalogenating, any toning developer, warm or cold, can be used to give the
purest tones possible.
Potassium ferricyanide, 8.0 g
Potassium bromide, 12.0 g
Water to make 1.0 liter
1. Develop, fi x, and wash a print in the usual manner. Use a neutral tone developer such
as Kodak D-72.
2. Immerse the print in the rehalogenating bleach until only a faint brown image remains.
3. Rinse the print for 5 minutes in running water.
4. Redevelop the print in any warm or cold toning developer.
5. If not otherwise specifi ed, wash RC prints for 5 to 15 minutes and fi ber-based prints
for 30 minutes.