Photography with emulsions: a treatise on the theory and practical working of gelatine and collodion emulsion processes (1882)
Abney, William de Wiveleslie, Sir, 1843-1920 · New York, Scovill manufacturing co. · leaf 198
s are washed, and whilst wet coated with the above solution, which is poured off and allowed to dry. After drying, the plates are again well washed and dried. The substratum given at page 78 also answers perfectly. Levelling Shelf. — The next point to look to is the shelf on which to lay the plates… … Fig. 13, The level L is placed first across the plate, and the two wedges X and Y are altered till the bubble B of the level is central ; the level is then turned lengthways along the plate, and the bubble caused to occupy its proper position * by shifting Z, not touching X or Y. This should cause…
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
