TONING BROMIDE PRINTS Zag 
B solution 50 ccm 384 min. 
C solution 50 ccm 384 min. 
Water 1000 ccm 16 oz. 
Without washing, transfer to the first bath given for blue- 
green. Rinse well and transfer to solution D. Treat with 
the dilute acid baths, wash well, and dry. 
Green tones can also be obtained (Sedlaczek) by bleaching 
the prints in: 
Lead nitrate NS 115 gr. 
Nitric acid 10 ccm 77 min. 
Potassium ferricyanide lg Te 
Water 1000 ccm 16 oz. 
Wash well, and immerse in: 
Ammonia iron alum 100 g 770 gr. 
Potassium bichromate, sat. sol. 50 ccm 385 min. 
Potassium bromide 5g 38 gr. 
Water 1000 ccm 16 oz. 
Treat the prints with a 3 per cent solution of hydrochloric 
acid until the whites are clean. Brighter green tones are 
obtained by immersion of the lead-bleached image in a 0.5 
per cent solution of potassium bichromate, rinsing, and then 
treating with the above iron alum bath. Or blue-green tones 
may be obtained by using the following instead of the iron 
bath: 
Ammonia iron alum 100 g 7/0 or: 
Potassium bromide 50 g 385 gr. 
Water 1000 ccm 16 oz. 
Uranium AND Iron TonineG (Blake-Smith).—This also 
gives blueish-green tones: 
Uranium nitrate 5g 38.5 gr. 
Ammonio-citrate of iron 5g 38:5 gr: 
Nitric acid 5g 38.5 gr. 
Potassium ferricyanide 10g 77 gr. 
