94 PHOTOGRAPHIC FACTS AND FORMULAS | 
DiocEN.—Generally used in one solution: 
Sodium sulphite, dry 150 '¢ 2 02: 5/72 ee 
Diogen 75.¢ 102, 196 er: 
Potassium carbonate 375 g 6 oz. 
Water 1000 ccm 16 oz. 
Mix 1 part with 4 parts water. 
EDINOL.—One solution: 
Potassium metabisulphite 300g +40z., 384 gr. 
Water 500 ccm 8 oz. 
Dissolve and add: 
Edinol 100g _ 1oz., 318 gr. 
Then add: 
Caustic potash 220g 30z., 249 gr. 
Water 1000 ccm 16 oz. 
Mix 1 part with 10 to 20 parts water. 
One solution with carbonate: 
Sodium sulphite, dry 50 g 384 gr. 
Edinol 50 g 384 gr. 
Sodium carbonate, dry 2S 96 gr. 
Water 1000 ccm 16 oz. 
Mix 1 part with 5 to 10 parts water. The sodium carbonate 
may be replaced by potassium carbonate 15¢g (1l5gr.), 
when the developer acts more rapidly. Gives very clean 
negatives. 
Two solution: 
A. Edinol 10g 77 gr. 
Sodium sulphite, dry 100 g 770 gr. 
Water 1000 ccm 16 oz. 
B. Sodium carbonate, dry 5 per cent solution 
or Potassium carbonate 5 per cent solution 
Mix in equal volumes. The potash works more rapidly and 
gives denser negatives. 
