Black Generation

Describes how the color black is used in a set for four-color printing. In theory, black is not required in the CMYK color system for representing various hues of an image. In practice, however, it is used whenever contrast and detail need to be enhanced in dark areas. The term short black or skeleton black is applied if the color is only used for this purpose (for which only a small amount of black is required). Black can also be used in color mixes to replace equal components of the three chromatic colors cyan, magenta and yellow (Under Color Reduction), thereby reducing the total volume of ink actually required in the print. This is known as long black.

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