The American annual of photography (1914) (14757337496)

Identifier: americanannualof28newy (find matches)
Title: The American annual of photography
Year: 1914 (1910s)
Authors:
Subjects: Photography
Publisher: New York : Tennant and Ward
Contributing Library: Harold B. Lee Library
Digitizing Sponsor: Brigham Young University



Text Appearing Before Image:
COLOR PHOTOGRAPHY By M. C. RYPINSKI OLOR Photography on transparency plates haslately been so successfully brought within thereach of the average amateur, that it seemsdesirable at this time to give a brief statementof some of the underlying features of the bestknown processes. This will necessarily involve some con-sideration of the properties of light. Light, according to the Undulatory theory, is a sensationproduced on the retina of the eye by a wave motion of theether, all light travelling with the same velocity, the differencein color sensation being due to differences in wave length andfrequency. Daylight, or white light, is a combination of color sensationsand may be broken up as by a prism or a diffraction grating ii6
Text Appearing After Image:
CLOTILDE von DERP. -Copyright by E. O. Hoppe. into its component spectral colors, red, orange, yellow, green,blue, indigo and violet. Of these color sensations the red has the greatest wavelength and the lowest frequency. The wave length decreasesand the frequency correspondingly increases as we go onthrough the spectrum toward the violet. Beyond the red is an invisible portion of the spectrum knownas the infra red, and correspondingly beyond the violet wehave the ultra violet, both of which are characterized by theirchemical action upon light sensitive substances. It has been shown that all of these colors, and indeed everycolor, may be reproduced by the proper combination of notmore than three primary colors, red, green and blue. Painters and printers are accustomed to regard red, yellowand blue as the three primaries, but this is due to their workingwith the subtractive method of color combination, i. e., theplacing of colors one on top of another so that the final coloris the resu