SILVER PRINTING PROCESSES 
Water 5 ccm 38 min. 
Castor oil 1 ccm 8 min. 
Krippendorff — 
Pyroxyline Zio. 161 gr. 
Alcohol 600 ccm OY oz. 
Ether 400 ccm 634 oz. 
Citric acid 2) ie 19 gr. 
Calcium chloride, cryst. 2:52 19 gr. 
-oilver, nitrate | >’ 2Zlg 161 gr. 
V alenta.— 
Pyroxyline 22:52 165 gr. 
Alcohol | 500 ccm 8 oz. 
Ether 500 ccm 8 oz. 
Citric acid 18g 138 gr. 
Calcium chloride, dry 14¢ 10 gr. 
Dissolve the above, and add: 
Silver nitrate 3g 235) or. 
Ammonia q. Ss. q. Ss. 
167 
Powder the silver, add just enough ammonia to form a clear 
solution, and add alcohol 30 ccm (230 min). ‘Then add: 
Silver nitrate I5¢ US es ws 
Water 5 ccm 38 min. 
Glycerine 2.5 ccm 19 min. 
Alcohol 70 ccm 538 min. 
Dissolve by heat. This is specially suitable for platinum 
toning, and gives sepia prints without toning. 
Liesegang.— 
Pyroxyline 24¢ 184 gr. 
Alcohol 500 ccm 8 oz. 
Ether 500 ccm 8 oz. 
Lithium chloride, cryst. 3¢ Zo2r: 
Silver nitrate 24¢ 184 gr. 
