Developers 
Acrot.—The Eastman name for amidol, which see. 
ApuroL.—This is either bromhydrochinon (Schering) or 
chlorhydrochinon (Hauff), gives softer negatives than 
hydrochinon, and is less affected by temperature: 
A. Sodium sulphite, dry 125s 2 oz. 
Adurol 16.6 g 128 gr. 
Water 1000 ccm 16 oz. 
B. Sodium carbonate, cryst. 350 g 534 Oz. 
Water | 1000 ccm 16 oz. 
Mix 3 parts A with 2 parts B. 
A. Adurol 20 g 154 gr. 
Potassium metabisulphite 20 g 154 gr. 
Water 1000 ccm 16 oz. 
B. Caustic soda 75g 576 gr. 
Potassium bromide 2¢g 15 gr. 
Water 1000 ccm 16 oz. 
Mix in equal volumes. 
A. Adurol 20 g 154 gr. 
Sodium sulphite, dry 80 g 615 gr. 
Water 1000 ccm 16 oz. 
B. Potassium carbonate 125 ¢ Z'O2: 
Water 1000 ccm 16 oz. 
For studio and instantaneous work mix in equal volumes. 
For time exposures and landscape work mix equal volumes 
A, B, and water. 
AmipoLt.—A stable amidol developer (Namias) : 
Sodium sulphite, dry 215 192 gr. 
Amidol 5g 38 gr. 
Ot 
