The color c ards of the Textile Color Card Association of the United Stat es are widely used i n the textile and a lli ed industries and by many p rocuring agencies o f t h e Federal Government. The Textile Color Card Association issues both seasonal and standard color cards. The seasonal car ds p rovide a color-fo recastin g sery ice to textile manufacturers and promote color coord ination am ong t h e t rades; the standard cards present colors for which there is a popu la r and continuing demand. Most impor tant of the color cards is t he Standar d Color Card of Ameri ca, the current nint h ed ition containi ng 216 colors. Preeminent amon g t he m a ny special sets of color cards iss ued by t he Association for use of the Federa l Governm ent is t h e United States Army Color Card showing 22 official colors for the arms and services. T he specification of the colors of t he Ninth Edition Standard Color Card and the Un ited States Army Color Card h as been undertaken for the pur pose of correlating these textile standar ds with American War Standard Z44-1942 for the specification and description of color. T he 238 samples comprising these color cards have been examined by basic spectrophotometric and colorimetric procedures. From th is study t here have been foun d d ayli ght r eflectance, Y, ch romaticity coordinates (x,y) , Munsell renota.t ions, and I SCC-NBS color designations for these samples, as recommended by American W ar Stan dar d Z44-1942. As more than half of these texti le s tandards a re flu orescent, and as existing spect.rophotometers are not sui ted t o t h e evaluation of such samples, considerahle reliance has been p laced on q uantitative co lorimetri c an d p hotometric comparisons with t h e Munsell colo r standards, both by means of a chromati city-difference colorimet.er and by t he Martens p h otom eter.As a closing check, Munsell book notations of these textile standards h ave been obtained by a direct visual comparison with the color scales of t he Munsell Book of Color.
This paper is a continuation of Bureau Research Paper RP1209 and describes the cooperative work done by the Association of American Railroads Signal Section, Corning Glass Works, and the National Bureau of Standards leading to the formulation of the AAR Signal Section specifications for signal colors and glasses. Red.-Will be of such quality that all yellow rays of light are absorbed, the spectrum being either red, or red and orange. The photometric value shall be, light 125, standard 100, dark 75. Green.-Will be of the color known as admiralty green, having a slightly bluish tint. The spectrum shall show very little yellow, being a full green with some blue. The photometric value shall be, light 125, standard 100, dark 75. Yellow.-Will give a spectrum showing a full yellow band, most of the red and slightly of the green. The photometric value shall be, Jight 120, standard 100, dark 80. Blue.-Will give a spectrum having a full blue band, with a narrow band of green. The photometric value shall be, light 125, standard 100, dark 75. Purple.-Will give a spectrum showing a considerable proportion of both red and blue. The photometric value shall be, li ght 125, standard 100, dark 75. Lunar White.-Shall show a maximum of absorption for the yellow. The photometric value shall be, light 120, standard 100, dark 80.
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