Subtraction colors

Printers use colored materials, eg, inks (qv), that absorb or subtract regions of the visible spectmm from white light. Subtractive color is usually represented by the three printer s primaries cyan, magenta, and yeUow (CMY). Cyan absorbs red light, magenta absorbs green, and yeUow absorbs blue light. 

Subtractive color photography, 79 283 Subtractive dye imaging systems, 79 284-298... 

SUBTRACTIVE COLOR PROCESS. A method of photographic color synthesis using two or more superimposed colorants, which selectively absorb their complementary colors from white light. 

Color Dyes. Color quality is determined by the dyes chosen for the primary colors yellow, magenta, and cyan. Important parameters for subtractive color reproduction are peak wavelength, breadth of absorption peaks and the absence of secondary absorptions [11]. 

LCDs are based on subtractive color technology and are therefore not as bright as emissive displays such as CRTs and the newer organic light-emitting devices. 

A recent study by Ohta (1) of dyes used in photography has indicated the important parameters of a set of dyes for subtractive color reproduction are ... 

Non-self-illuminating colors lead to subtractive color mixtures. Such mixing occurs by absorption or by scattering. In this case, a distinction between transmission and remission must be made. If, for example, a neutral... 

Colorant mixture n. Mixture of colorants containing pigments, or dyestuffs, or both. The color of a mixture may be predicted by subtractive colorant mixture theories. 

Color order systems n. Systems used to describe an orderly three-dimensional arrangement of colors. Three bases can be used for ordering colors (1) an appearance basis, i.e., a psychological basis in terms of hue, saturation, and lightness - an example is the Munsell System (2) an orderly additive color mixture basis, i.e., a psychophysical basis - examples are the CIE System and the Ostwald System and (3) an orderly subtractive color mixture basis - an example is the Plochere Color System, based on an orderly mixture of inks. 

Complementary colors n. Two colors which, when mixed together in the proper proportions, resnlt in a neutral color. Colored lights, which are complementary, when mixed additively, form white light and follow the lam of additive color mixture. Colorants, which are complementary, when mixed together, form black or gray and follow the laws of subtractive colorant mixture. With the exception of spectrophoto-metric complementaries, which exist only in theory, colors, which are complementary depend on the illuminant chromati-city considered as the neutral point. McDonald R (1997) Colour physics for industry, 2nd edn. Society of Dyers and Colourists, West Yorkshire, England. 

Complex subtractive colorant mixture See subtractive colorant mixture, complex. 

Plochere color system n. A color order system based on subtractive colorant mixture developed by mixing a limited number of pigments in systematically varied proportions. 

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