DEVELOPERS 101 
Hydrochinon 390 g 13 oz. 
Sodium sulphite, dry 2000 g 4 Ib. 
Sodium carbonate, dry 2000 g 4 Ib. 
Potassium bromide 90 g SiOz: 
Water AO litres 1280 oz. 
Temperature 65° to 68° F. For film developed on drum add 
to above 45g (1% 0z.) potassium bromide and develop at 
2° FE. 
Cramer’s Contrast Developer for Line Work.— 
A. Hydrochinon 45 ¢ 1Y, oz. 
Sodium sulphite, dry 30 g 1 oz. 
Sulphuric acid 4 ccm 60 min. 
Water 1000 ccm 32 oz. 
B. Sodium carbonate, dry 30 g oz: 
Potassium carbonate 90 g 3 02. 
Potassium bromide 8g 120 gr. 
Sodium sulphite, dry 90 g 3 OZ. 
Water 1000 ccm 32 02. 
For use mix in equal volumes. Develop for 6 to 10 minutes. 
Temperature 21° C. (70° F.). This may also be used for 
X-ray and lantern plates. 
KopELon.—Paramidophenol hydrochloride is sold by the 
_Eastman Kodak Co. under this name, especially for use with 
developing papers, under which heading formulas may be 
found. 
Metot.—A very rapid developer, rarely used alone, but 
generally in combination with hydrochinon or pyrogallol. 
Also marketed by the Eastman Kodak Co. under the name 
Elon. Motol is another synonym. 
Metol-potash.— 
A. Metol 10g To 
Sodium sulphite, dry 50 g 384 gr. 
Water 1000 ccm 16 oz. 
