When making the plate, the original manuscript should be divided into green (C), magenta (M), yellow (Y) and black (K). What is the principle of color separation?

Answer: color picture or color photograph, the color of its picture has thousands of kinds. It is almost impossible to print thousands of colors in a color. A four-color printing method is used in printing. That is, the original manuscript is first decomposed into green (C), magenta (M), yellow (Y) and black (K), and then the color is synthesized when printing. The so-called "separation" is according to the principle of the subtractive method, using red, green, blue three color filter on different wavelengths of light of the characteristics of selective absorption, and the manuscript is decomposed into yellow, taste, green color. In the process of color separation, the colors of light that is absorbed by color filter is the complementary color of light color filter itself, so that in the film, black-and-white images of negative, and network, any node negative, the final copy, into all kinds of printing blocks. This is the earliest photographic separation principle.

Due to the development of printing technology, we can now through the prepress scanners will be original color separation, sampling and translated into digital information, it is using the same process method to decompose the original color same as red (R), green (G), blue (B) three color, and digitally, again by mathematical calculation with a computer and can turn numeric information into green (C), magenta (M), yellow (Y) and black (K) four color information.