DEVELOPERS 107 
Hydrochinon 4g 60 gr. 
Sodium carbonate, dry 21g 34 OZ. 
Potassium bromide lg 15 gr. 
Witter) (1; 1150 ccm 40 oz. 
Neou.—This is a fine, white, crystalline powder, insoluble 
in water except in the presence of caustic alkali, which should 
be very pure, so that the manufacturers recommend only the 
use of Hauff alkali, which may be obtained either in solid 
form or in solution, in connection with this developer. The 
alkaline solution is prepared as follows: 
Hauff alkali (caustic soda) 400 ccm Z0Z: 
Water 1000 ccm 5 oz. 
The developing solution is compounded as follows. For 
tray development; time, three to five minutes: 
Water 1000 ccm 16 oz. 
Sodium sulphite, anhydrous 5g 40 er. 
Neol lye solution, as above 20ccm E/3) Oz. 
Neol 4¢g Silver. 
In case of over-exposure 10 to 20 drops of 10 per cent potas- 
sium bromide solution may be added. 
For tank development, 15 to 20 minutes: 
Water 100 liters Zeal. 
Sodium sulphite, anhydrous 300g 10 oz. 
Neol lye solution 1200 g 40 oz. 
Neol 200 g 634 oz. 
Potassium bromide, 10% sol. 15 ccm VY oz. 
Neol is claimed to work free from fog and therefore to 
be excellent for underexposed negatives. 
OrtoLt.—A molecular compound of two molecules of metol 
with one of hydrochinon: 
A. Potassium metabisulphite 75S 53:7) 20. 
Ortol 158 115) en: 
Water 1000 ccm 16 oz. 
