HP Color LaserJet 8500 Service Manual - Page 140

Color theory There are two methods used to create color. The subtractive process (which is used in this printer) and the additive process (which is used in monitors and television). Subtractive color theory The subtractive color theory deals with mixing color pigments (such as those found in toner, ink, and paint) to produce any color. The subtractive primary colors are cyan, yellow, and magenta. Primary colors will produce any color in the spectrum when combined in certain proportions. The subtractive process begins with an external white light reflected from a white surface (for instance, paper). The color components of the light are reflected or absorbed by the paper and toner. Subtractive color absorption Table 28 describes how colors are mixed to produce subtractive colors. Table 28. Subtractive color absorption Pigment color Magenta Yellow Cyan None Color of absorbed light Green Blue Red None Colors of reflected light Blue Red Red Green Green Blue Red Green Blue Perceived color Magenta Yellow Cyan White 138 Chapter 5 - Theory of operation EN