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ABSTRACT Although the artist uses subtractive color mixture when the starting point is a white surface and color mixture is accomplished by physically intermixing paints, he can use additive color mixture if he applies his paints to the canvas in small dots, creating a mosaic structure....
Book reviewed in this article: ARTISTS'PIGMENTS: LIGHTFASTNESS TESTS AND RATINGS, by Henry W. Levison. THE SPLENDOR OF IRIDESCENCE, STRUCTURAL COLOR IN THE ANIMAL WORLD, by Hilda Simon.
ABSTRACT With modern reflectance spectrophotometers, using digital ratio recording, precision depends mainly on the linearity of the photomultipliers. A simple method is described, which allows the calibration of the multiplier response. It consists of a mirror assembly that uses a fraction of...
ABSTRACT The wavelength dependence of the efficiency of an integrating sphere alters the relative spectral irradiance of the light‐source system of which it is a part. Since the total radiance factor (reflected plus fluoresced energy) of a fluorescent material depends upon this irradiance,...
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