Platinotype : its preparation and manipulation (1895)
Abney, William de Wiveleslie, Sir, 1843-1920, Clark, Lyonel · London : Sampson Low, Marston & Co. · leaf 159
CURVES OF GRADATION. 153 gradation given by platinotype in comparison with silver prints. The annexed diagram illustrates the difference between the two. The intensities of the light acting in the two cases were the same, and varied from 1 to ^ ^ parts. It will be noticed that platinotype was… … Fig. 7. — Intensities of light-acting. when had been given. The straight sloping lines show the general gradation of the two, and it does not differ much in either as indicated by the angle of the slope of these lines. It appears from this diagram, that with a plucky negative, platinotype would…
Photography
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
