208 PHOTOGRAPHIC FACTS AND FORMULAS 
Hydrochinon 2.9¢ 90 gr. 
Sodium sulphite, dry 10.5 ¢ 330 gr. 
Sodium carbonate, dry 35 g - 2Y oz. 
Add 2 drops of 10 per cent potassium bromide solution to 
each 30ccm (loz.) of developer. Use full strength at 
Ee OO (Coal aia 
For professional use; soft developer for Artura Iris, Azo 
and other professional papers. Dissolve in order named: 
Water 1000 ccm 40 oz. 
Kodelon - 0.5 ¢ 10 gr. 
Hydrochinon 2g 40 gr. 
Sodium sulphite, dry 95¢ 180 gr. 
Sodium carbonate, dry 95¢g 180 gr. 
Add 1 drop of saturated solution of potassium bromide to 
each 60ccm (20z.) of developer. Use full strength at 
bey CoGare P.) 
Tozol Developer—Stock solution for developing papers. 
Dissolve in the order named: 
Hot water 1000 ccm 30 oz. 
Tozol 931/32 1 oz: 
Sodium sulphite, dry 100 g 3 0z. 
Sodium carbonate, dry 752 2% oz. 
Potassium bromide 3¢g 45 gr. 
Wood alcohol 150 g AYA 02. 
For portraiture on Artura and Azo use 100 ccm of stock 
solution to 700 ccm water (1 oz. to 7 0z.). 
For Velox, bromide, and amateur finishing grades of Azo, 
add 67 ccm (20z.) of dry sodium carbonate to the above 
quantity of stock solution and for use dilute 1 to 2 for Velox 
and Azo, and 1 to 6 for bromide papers. Use at 21° C. 
(70 By): 
Hator PAPEers.— 
Metol 0.78 g 15 gr. 
