Abstract

A subcommittee of the Inter-Society Color Council was established in 1944 to study two things: “What color temperature of natural daylight is used by textile color matchers?” and “What color temperature of artificial daylight is preferred by textile color matchers?” The Philadelphia Army Quartermaster Depot and three large textile companies—Forstmann, Botany, and Pacific—cooperated in the work. As a result of its study, summarized here, the subcommittee recommends that artificial daylight lamps for textile color matching be aimed at 7500°K with an illuminance of more than 75 and less than 300 footcandles. (By artificial daylighting, the subcommittee means an illuminant that has an energy distribution as similar to that of daylight of equivalent color temperature as it is possible to obtain commercially.)

© 1948 Optical Society of America

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