...otography 减色法直接正像处理 positiveprocess ; subtractivedirectpositiveprocess 而在减色法中 In The Subtractive Process ..
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In the subtractive process, colors are produced when dye (as in paint or color photographic materials) absorbs some wavelengths and so passes on only part of the spectrum.
而在减色法中，染料(比如在绘画颜料或彩色照相材料中)吸收了部分波长而只允许分光谱通过，从而产生各种色彩。
Magenta: One of the subtractive primary colours. It is used in four-colour process printing. Also referred to as process red.
洋红：减法原色之一。是四色彩印所用的颜色。亦称四色红。
Blue printer: One of the four printing plates in a subtractive colour process which is to be printed in cyan ink.
蓝版：减色彩印法的四张印版之一。它需用青蓝色墨印刷。
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