Abstract

Distributions of chromaticities have been computed for 171 pairs of typical dyes, involving five yellows, nine cyans, and nine magentas. Beer’s law was assumed, and the computations were performed on automatic, punched-card computing and tabulating machines. A selected ordinate method was used. The concentrations of the dyes in each mixture were considered to be varied systematically, so that ninety chromaticities were computed for each pair of dyes. Since each dye was used in combinations with each of as many as eighteen other dyes, the results show the influence of various characteristics of spectrophotometric curves on chromaticity distribution, gamut, and luminous transmittance. Some computations were made to study the behaviors of neutral mixtures of triads of dyes when the concentrations of all components are changed by a common factor.

© 1949 Optical Society of America

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