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|Formulas & Procedures|
In response to requests to put in one place the formulas we use in the darkroom, we are posting them here. Fuller information on their use can be found in the various articles.
For use: 1-1-1-7 (the 7 parts is water)
We develop by inspection and generally start looking at 8 minutes. All films will vary in this regard.
28% Acetic Acid 100 cc per each 1/2 gallon of water Use for about 30 seconds
Rapid Fix without hardener for 4 minutes
We then use Perma Wash for 5 minutes and follow with a 30-minute wash
Developer: Amidol for use with Azo. Mix at room temperature just before use.
Developer: Amidol for use with Enlarging Paper. Mix at room temperature just before use.
Acetic Acid 28% 100 cc per each 1/2 gallon of water Use stop bath for 10 -15 seconds.
32 ounces dry measure Sodium Thiosulfate Prismatic Rice Crystals per each gallon of water. Mix at around 90 degrees. We mix 10 gallons at a time as a stock solution.
For use: To each 1/2 gallon of fixer Add 25 g of Sodium Bisulfite.
Sodium Thiosulfate without bisulfite Use for 4 minutes.
First Wash: 1/2 hour
3 ounces Perma Wash to 1 gallon water.
Use 5 minutes.
Final Wash: One hour
Dry Prints face down on nylon drying screens.
Flatten Prints in dry mount press for 15 seconds.
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