A complete treatise on the art of retouching photographic negatives and clear directions how to finish & colour photographs (1901)
Johnson, Robert · London, Marion · leaf 179
, ~2g 8< 23, bOMO'SQ U A R e7"LO N' O'oT N't W~ These Cartridges are made up, one of Pyn^gallic Acid and the other of Sulphite of Soda and Carbonate of Soda in correct proportions. Six tubes of each sufficicmt lor 60 ounces of Dex’eloper. Directions. — Take one each Nos. i and 2, and dissolve each… … These Cartridges consist ot pulverised Hyposulphite of Soda and Theoninc in correct proportions, and are packed in specially prepared tubes. Being in powder they dissolve very quickly, and their portable form specially commends them to travellers and tourists. Directions. —For fixing Plates, mix…
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
