subtractive color process

基本解釋

Yellow: Minus-blue subtractive primary used in the three-color process.
黃色：藍色的補色，主要用在三色處理。
CMYK: Cyan, Magenta, Yellow, Black. Process color printing inks (subtractive primaries) to print continuous-tone images.
印刷四色：青藍、洋紅、黃、黑，稱四色印刷油墨，多用于印刷連續(xù)色調之圖像。
hxc0929pd.blog.163.com
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.
而在減色法中，染料（比如在繪畫顏料或彩色照相材料中）吸收了部分波長而只允許分光譜通過，從而產生各種色彩。