108 PHOTOGRAPHIC FACTS AND FORMULAS 
B. Sodium carbonate, dry 60 g 460 gr. 
Sodium sulphite, dry 90 g 690 gr. 
Potassium bromide 15g 11.5 gr. 
Hypo 0.5 ¢g 3.8 gr. 
Water 1000 ccm 16 oz. 
The same weight of potassium carbonate may be used instead 
of the soda. Mix 1 part A, 1 part B, and 1 part water; for 
a more rapid developer mix A and B in equal volumes. 
Stock solutions for Hammer plates: 
L. Ortol 21g 160 gr. 
Water 1000 ccm 16 oz. 
2. Sodium carbonate 3lg 240 gr. 
Sodium sulphite 15.5 ¢ 120 gr. 
Water 1000 ccm 16 oz. 
For use take: 
No. 1 solution 125 ccm 1 oz. 
No. 2 solution 125 ccm 1 oz. 
Water 750 ccm 6 oz. 
PARAMIDOPHENOL.—One solution: 
Paramidophenol hydrochloride 4g 31 gr. 
Sodium sulphite, dry 40g 310 gr. 
Sodium carbonate, dry 40 ¢ 310 gr. 
Water 1000 ccm 16 oz. 
Ready for use. Does not keep so well as in separate solutions. 
A. Paramidophenol hydrochloride 20¢ 154 gr. 
Water 1000 ccm 16 oz. 
B. Sodium sulphite, dry 60 g 460 er. 
Potassium carbonate 120 g 920 gr. 
Water 2000 ccm 32 oz. 
Mix 1 part A with 2 parts B. More suitable for papers and 
transparencies than negatives. 
One solution, similar to rodinal (Ermen) : 
Water 625 ccm 11 oz. 
