The color of a particular object is usually contingent on the white light striking the surface of the object and being completely or at least partially absorbed in the surface of the material, with the remaining light being reflected from it. Consequently, when a person sees the color "red," for example, it means that all of the incoming wavelengths (white light) have been absorbed by the surface of the object viewed except those wavelengths which constitute the color we have designated as red. If the light reflected from the surface of the object is allowed to pass through a further colored layer before reaching the eye, such as, for example, a transparent yellow film, more light will be absorbed, and the result will be a mixed color, i.e., orange. This process is called "subtractive color mixture," or color obtained by successively eliminating light of different wavelengths from white light.
Pigments, as well as dyes and inks, are mixed with one another to create new hues according to the subtractive system. In theory, any chromatic hue may be obtained by a mixture of the three primary colors. In practice, however, many hues can only be approximated by mixing primaries. See also: COOL COLORS ;FAST COLORS ;FUGITIVE COLORS ;WARM COLORS .
2. Pigment or aniline colors used on the edges of books or on endpapers for tinting or coloring purposes. 3. The suspension or slurry of the materials for use in the pigment coating of paper. (17 , 140 , 233 , 234 , 350 )