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How to distinguish between spot color and four-color printing?
time:
2020/11/24
Source:
spot color refers to the printing process that uses inks other than c, m, y and k inks or mixes a single ink through c, m, y and k inks to reproduce colors. Packaging printing often use spot colors to print large areas of the background color. So what kind of products use spot colors?
The cover of a packaged product or book is often composed of uniform color blocks of different colors or regular gradual color display and text. These color blocks and text can be separated by using four-color primary color ink. You can also deploy spot color ink printing, and then print only a 1 of spot color inks at the same color block. In the case of comprehensive consideration to improve the printing quality and save the number of overprints, sometimes to choose the spot color ink to print.
four colors (usually composed of dots) are the printing process of c, m, y and k inks (cyan, magenta, yellow and black) to reproduce various colors of color originals. What products use four-color printing? Under normal circumstances, the use of color photography to reflect the nature of the colorful color changes in the photos and human expressions, the artist's works of art or other images containing many different colors. For process requirements or for economic considerations, the painting 1 must be scanned by an electronic color separator or a color desktop system. Then the four-color printing process is used to complete the copy.

the color of the ink prepared by spot color printing is obtained according to the principle of subtractive color mixing of colorants, and its color lightness is lower and saturation is higher. The solid bottom with uniform ink color adopts spot color printing. When the amount of ink is appropriately increased, the sensitivity of the change in the thickness of the ink layer to the color change will be reduced. So it is easier to get ink color uniform, thick printing effect.
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