DEVELOPERS us 
For tray, use: Stock pyro solution 72 ccm, acetone 24 ccm, 
water 928 ccm; or pyro solution 1 oz., acetone 3 drams, water 
14 oz. 
For tank, use: Pyro solution 21.5 ccm, acetone 12.5 ccm, 
water 1000 ccm; or pyro solution 1%4 oz., acetone 5 drams, 
water 58 oz. ) 
Temperature 21° C. (70° F.) Time 30 minutes. 
Ansco Pyro-Soda.— ~ 
1. Potassium metabisulphite 16.3 g 250 gr. 
Sodium sulphite, dry 62.5 g Zi0z! 
Pyrogallol 16.3 g 250 gr. 
Water 1000 ccm 32:02. 
2. Sodium carbonate, dry 70g 24 oz. 
Water 1000 ccm 32 oz. 
For use mix No. 1, 1 part, No. 2, 1 part, water, 2 parts. 
Time of development 5 minutes at 18° C. (65° F.). 
Kodak Film Pack Pyro formula.— 
Pyrogallol ig THAD eh 
Sodium sulphite, dry 5g 60 gr. 
Sodium carbonate, dry 6.5¢ Paony. 
Water 1000 ccm 2707: 
Temperature 18° C. (65° F.). Develop for 20 minutes. 
For Eastman N-C & Autographic Film— 
A. Pyrogallol SANs hoz. 
Sulphuric acid, c. p. 3 ccm 20 min. 
Water. 1000 ccm 28 oz. 
B. Sodium sulphite, dry 107 g JIOZ: 
Sodium carbonate, dry FASS 202: 
Water 1000 ccm 23) Oz. 
For use mix 1 part A, 1 part B, 8 parts water. 
For Seed and Stanley Plates—For tray developer: 
