SULPHIDE TONING 243 
Red brown A Lets Th 4 
Very warm brown A DV Miy2 
Red chalk A Il 
Schlippe’s salt is also known as sodium sulphantimoniate. 
The crystals should be rinsed with water before use, and a 
drop or two of ammonia added to the stock solution. 
Various tones may also be obtained with mercury salts by 
the following baths. Bleach the prints in: 
Mercuric chloride . I2¢ 92 gr. 
Potassium bromide I2¢ OZ ar: 
Water 1000 ccm 16 oz. 
Wash thoroughly, and use the following baths for the various 
colours : 
Greyish-black : 
Hypo 10.5 g 80 gr. 
Water | 1000 ccm 16 oz. 
Grey-violet: 
Hypo 10.5 g 80 ger. 
Potassium metabisulphite 5.25 g 40 er. 
Water 1000 ccm 16 oz. 
Brown to violet-black : 
Hypo 18.75 g 144 gr. 
Cupric sulphate 18.75 g 144 gr. 
Water 1000 ccm 16 oz. 
The addition of a few grains of sodium carbonate gives 
darker tones. 
Brownish-violet : 
Hypo 12.5 ¢ 96 gr. 
Silver nitrate 42¢ 32 or: 
Sodium metabisulphite 6:25 )g 48 er. 
Water 1000 ccm 16 oz. 
It should be noted that all mercury toning gives intensifica- 
tion. 
