338 PHOTOGRAPHIC FACTS AND FORMULAS 
Hydrochloric acid 11.5 ccm 88 gr. 
Citric acid 7g 54 gr. 
Water 800 ccm 1234 oz. 
Allow the mixture to cool, remove the skin, press through a 
fine cloth, coat the paper, and dry. This will keep any length 
of time. The paper is salted by floating on: 
Ammonium bromide 20g 154 gr. 
Magnesium iodide 48 ¢ 370 gr. 
Magnesium chloride 8g 61 gr. 
Water 1000 ccm 16 oz. 
This should be sensitised on: 
Silver nitrate 100 g 768 gr. 
Glacial acetic acid 40 ccm 307 min. 
Water 1000 ccm 16 oz. 
Small sheets may be floated, and large ones can be painted 
with the solution. Expose while damp until the details are 
visible, and develop with: 
Gallic acid 20 g 154 ger. 
Lead acetate 10¢ ie 
Glacial acetic acid 75 ccm 576 min. 
Water 1000 ccm 16 oz. 
After development immerse the print in weak soda solution, 
and fix. 
ee ee 
