In three color photographic processes the cyan dye image is usually controlled by the red sensitive emulsion, the magenta dye image by the green sensitive layer, and the yellow dye image by the blue sensitive layer. Due to the proximity of these three layers in a color film interactions among the images are found to occur. It has been found that when the images are combined into a three color picture they do not have the same characteristics as they would have if they occurred separately. The density produced in each layer depends not only on the amount of exposure of that layer but also on the amount of exposure in the other layers. The amount of dye image produced in one layer is therefore influenced by the presence or absence of simultaneous development in the other layer. The specific nature of these interactions is an important characteristic of any given color photographic process and are known as interimage effects. These interactions may be studied by means of sensitometric exposures. Interimage effects have been found in both Kodak Ektachrome Film 5258 (Tungsten) and GAF 2500 (Daylight). Data was obtained by exposing each film to produce single layer exposures and an additive neutral. Plotting the characteristic curves from the data revealed an interaction taking place in each film. Due to the inability to determine the equivalent neutral densities this report can only justifiably say that an interaction is present in both films. For a more, definitive statement on the interimage effects present in each film one must determine the equivalent neutral densities.

Library of Congress Subject Headings

Color sensitometry (Photography)

Publication Date


Document Type


Department, Program, or Center

School of Photographic Arts and Sciences (CIAS)


Abouelata, Mohamed


Note: imported from RIT’s Digital Media Library running on DSpace to RIT Scholar Works. Physical copy available through RIT's The Wallace Library at: TR515.W92


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