How to determine printing color separation parameters according to paper performance
1、 The compensation sample for dot increase is set. When the ink is transferred to the paper surface under pressure, due to the absorption of the paper, the ink diffuses around when penetrating, resulting in dot increase and darkening the whole image. Obviously, for different quality paper, it will produce different dot enlargement effects. The stronger the paper absorption, the greater the dot expansion value. Specifically, newsprint is the largest and coated paper is the smallest. The dot formed by the paper performance increases generally. This article is edited and sorted by Duoduo printing network.
1、 Compensation sample setting for dot increase
When the ink is transferred to the surface of the paper under the action of pressure, due to the absorption of the paper, the ink diffuses around when penetrating, resulting in an increase in the dot, making the whole image darker. Obviously, for different quality paper, it will produce different dot enlargement effects. The stronger the paper absorption, the greater the dot expansion value. Specifically, newsprint is the largest and coated paper is the smallest. The dot enlargement formed by paper performance generally presents the expansion law of exponential mode. In the process of prepress processing, the influence of dot enlargement must be compensated.
For different sizes of dots, the dot increase value is different. Generally, the dot increase value of high-profile and dark tone is small, and the dot increase value of middle tone is large. It is generally recommended to use the default setting. For example, when printing on coated paper, the default value is about 17%, offset paper is about 22%, and newsprint is about 30%.