This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1911 Excerpt: ... 42C = 58C and if we arbitrarily make this yellow the standard of chroma or 100, it follows that the chroma of the purple-blue 42 X 100== 58 C C = 4200 or 72.4 58 In Plate III are shown five of the ten fundamental colors in various degrees of chroma. The central point (N) is a neutral gray, and as the colors move ...
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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1911 Excerpt: ... 42C = 58C and if we arbitrarily make this yellow the standard of chroma or 100, it follows that the chroma of the purple-blue 42 X 100== 58 C C = 4200 or 72.4 58 In Plate III are shown five of the ten fundamental colors in various degrees of chroma. The central point (N) is a neutral gray, and as the colors move outward they become higher in chroma; red having a possibility of 100 degrees of chroma, yellow 90, green 60, blue 50 and purple 60. It follows that the intermediates not shown in the plate, RP, YR, GY, BG and PB, have possibilities of chroma determined by the chromas of their constituent colors. Thus yellow-red has a possibility of a chroma between 90 and 100. Green-yellow about half-way between 60 and 90, or 75, etc. Plate III also illustrates an exact sequence of hue, based on equidistant hues in the spectrum with the addition of purple which unites the ends of the spectrum and produces a pigment color circuit. The colors in the plate show an increasing area of color, as the chroma increases, so that the difference in chroma may be noticed; but the position of the color in the circuit, its hue, is a single degree or division of the circuit of 100 hues. Thus red occurs at 20, yellow at 40, and yellow-red half-way between, or 30, etc. The exact numbering of the circuit is, of course, arbitrary. As purple does not occur in the spectrum, and as it fills the gap between the red and violet wave-lengths when we imitate the spectrum in pigments, it seems that the logical starting point in numbering should be where purple begins to take on a reddish hue. With this as a starting point, RP occurs at 10, R at 20, YR 30, Y 40, GY 50, G 60, BG 70, B 80, PB 90, P 100. With five equidistant hues established as shown in Plate III, it is an easy matter to produce...
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Add this copy of Color and Its Application to Printing to cart. $56.29, good condition, Sold by Bonita rated 4.0 out of 5 stars, ships from Santa Clarita, CA, UNITED STATES, published 2016 by Palala Press.
