88 PHOTOGRAPHIC FACTS AND FORMULAS 
Namtas.— 
Metol 
Sodium sulphite, dry 
Hydrochinon 
Caustic soda 
Hypo 
Water 
1000 ccm 
11.5 gr. 
230 gr. 
34 gr. 
38.5 gr. 
460 gr. 
16 oz. 
DEVELOPERS FOR DEEP TANKS FOR COMMERCIAL FINISH- 
ERS.—Eastman Kodak Tank A B C Pyro formulas: 
A. Sodium bisulphite 
Or potassium metabisulphite 
Pyrogallol 
Potassium bromide 
Water to 
B. Sodium sulphite, dry 
Water to 
C. Sodium carbonate, dry 
Water to 
9g 
9g 
60 g 
lg 
1000 ccm 
105 ¢g 
1000 ccm 
75g 
1000 ccm 
140 gr. 
140 gr. 
2 oz. 
16 gr. 
32 oz. 
3¥Y oz. 
32 oz. 
2Y4 oz. 
32 oz. 
Take 5¥% oz. each of A, B and C and add water to make one 
gallon (162 ccm to make 3785 ccm). Time of development 
about 12 minutes at 65° F. (18° C.). Portrait Super Speed 
film requires about 10 to 15 per cent longer development than 
other film. 
Metol-Pyro tank developer: 
A. Sodium bisulphite 
Metol 
Pyrogallol 
Potassium bromide 
Water to 
B. Sodium sulphite, dry 
Water to 
C. Sodium carbonate, dry 
Water to 
150 ¢ 
1000 ccm 
75g 
1000 ccm 
Y oz. 
Y oz. 
1 oz. 
60 gr. 
32 oz. 
5 oz: 
32 oz. 
2Y4 oz. 
32 OZ. 
