DEVELOPERS oS 
Sodium sulphite, dry 31.25 ¢ Y/ oz. 
Amidol 6:3) 2 48 gr. 
Potassium bromide 14g 10 gr. 
Glycollic acid 1.4 ccm 10 min. 
Water 1000 ccm 16 oz. 
Or: 
Sodium sulphite, dry 30 g 230 gr. 
Amidol Sig 38.5 gr. 
Lactic acid 5 ccm 40 min. 
Water 1000 ccm 16 oz. 
Alkaline amidol (Valenta). 
Sodium sulphite, dry I5¢g PS ox: 
Amidol 5g 38%4 gr. 
Caustic soda lg 7.7 gr. 
Water 1000 ccm 16 oz. 
This keeps quite clear during development and does not stain. 
Amidol is sold by the Eastman Kodak Co. under the name 
Acrol. 
Amupot-Pyro.—The following is recommended as having 
all the good properties of amidol and yet giving an image of 
the same colour as pyro: 
Potassium metabisulphite lg 8 gr. 
Sodium sulphite, dry 42¢ 336 gr. 
Amidol 5g AO er. 
Pyrogallol 28 16 gr. 
Potassium bromide lg 8 gr. 
Water 1000 ccm 16 oz. 
To this is added just before use: 
Caustic soda lg 8 gr. 
Water 1000 ccm 16 oz. 
This can be used for plates and papers without staining. The 
Watkins factor 1s 10. 
