206 PHOTOGRAPHIC FACTS AND FORMULAS 
Hydrochinon 23g 34 OZ. 
Sodium carbonate, dry 46 ¢ 1YZ oz. 
Potassium bromide a25\¢ 50 gr. 
Wood alcohol 138 ccm 4Y4 oz. 
Water to 1000 ccm 32 oz. 
2. Sodium carbonate, dry 46 ¢ LY oz. 
Water 1000 ccm" | See 
In preparing No. 1, dissolve each chemical in three-fourths of 
the water, heated to about 53° C. (125° F.), before the next 
is added. Normal development should require from 1% to 2 
minutes. 3 
For Etching Brown, use: 125 ccm of No. 1, water to make 
1000 ccm, and add 7 ccm of 10 per cent solution of potassium 
bromide (20z. of No. 1, water to 160z., and 60min. of 
potassium bromide solution). 
For Athena Old Master and Glossy, use: No. 1, 125 ccm, 
No. 2, 62.5 ccm, water to 1000 ccm, and add 3.5ccm of 10 
per cent solution potassium bromide (No. 1, 20z., No. 2, 
1 oz., water to 16 0z., and add 30 min. of potassium bromide 
solution). Temperature 21° C. (70° F). 
ARTURA.— 
1, Elon (metol) 6.5¢g 100 gr. 
Sodium sulphite, dry 100 g 3% oz. 
Hydrochinon 23 ¢ ¥, OZ. 
Sodium carbonate, dry 782 2% oz. 
Potassium bromide 3.25 ¢g 50 gr. 
Water to 1000 ccm 32 oz. 
Then add: 
Wood alcohol 138 ccm 41% oz. 
2. Elon (metol) 23.5 g V4 OZ. 
Sodium sulphite, dry 100 g 3% oz. 
Potassium bromide 9.75 g 150 gr. 
Water to 1000 ccm 32 oz. 
