120 PHOTOGRAPHIC FACTS AND FORMULAS 
B. Sodium carbonate, cryst. 156 g 24 02. 
Water 1000 ccm 16 oz. 
Mix in equal volumes. 
For Hammer Plates.—Stock solutions : 
1. Sodium sulphite 156 g 2Y4 oz. 
Water 1000 ccm 16 oz. 
2. Sodium carbonate 782 1% oz. 
Water 1000 ccm 16 oz. 
3. Potassium metabisulphite 78¢ 60 gr. 
Metol 15.6¢g V4 oz. 
Pyrogallol 46.8 g 34 OZ. 
Potassium bromide 39 ¢ 30 gr. 
Water 1000 ccm 16 oz. 
For tank take: 
No. 1 solution 41 ccm 5% oz. 
No. 2 solution 41 ccm 514 oz. 
No. 3 solution 41 ccm 514 02. 
Water 877 ccm 112% oz 
Develop 10 minutes at 65° F. 
For tray development: 
4. Pyrogallol 37 g 1 oz. 
Metol 46g 60 gr. 
Water 1000 ccm 27 02. 
Solution No. 2 as above 
Solution No. 3 as above 
For use take: 
No. 4 solution 100 ccm 1 oz. 
No. 2 solution 100 ccm 1 oz. 
No. 3 solution 100 ccm 1 oz. 
Water 800 to 1200 ccm 8 to 12 oz. 
Pyro-Metol Tank & Tray Developer for Eastman Portratt 
& Commercial Films.— 
