The science and practice of photography : an elementary textbook on the scientific theory and a laboratory manual (1920)
Roebuck, John R. (John Ransom), 1876-1965 · New York ; London : D. Appleton and company · leaf 74
PHOTOGRAPHY 52 subject, and developing it for a long time in a de- veloper which produces as little fog as possible. This contrast may be increased greatly by intensifi- cation. 35. Thickness of Film.— The effect of the thick- ness of the film on the glass plate is shown by the curves of Fig. 8.… … amount of development, the density depends on the thickness of the film; in general the thicker the film the greater the density. The thinner coated plates have a much shorter straight part to the curve, that is, the period of correct exposure (called latitude) is much shorter, the exposures have…
Photography
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