There is a need, such as printing color on the yellow page phone book, you need to print a set of white (a white color block), including the area that needs to be printed in color, and then print four colors, of course, if it is on other colored materials For printing, I don't want the four colors to stack up, but also need to print white first.
How to design a white version if the white background is printed only in areas with printing? The four-color printing can be separated by channels. Should the white version be made separately? If the printed body is turbid and solid, should the white version be painted? Is there an easy way?
Directly make a black plate with the same printing area, marked as spot color white, printing white first, then printing four colors. The white version is actually a spot color version, the area is the same as the area of ​​the graphics you need, CMYK + spot color white. For example, if you want to write on a concrete wall, you generally need to paint a layer of white paint first, and then apply other colors. The reason is the same.
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