In color reproduction system, the quality of printed matter is affected by many factors, and the performance of most printed matter depends on the relationship between printing ink and the printed material, which is divided into coated paper and uncoated paper.
The so-called coated paper is coated with a coating color on the base paper to make the paper have good optical properties and printing performance. Its main uses are: printing magazines, books and other publishing paper and trademark, packaging, catalog and other printing paper, the ratio of the two is about 1:3.
Coated paper can be divided into: coated paper, coated paper, light weight coated paper, in addition, there are special coated paper such as branded coated paper. For this kind of coated paper, the classification of countries in the world also has some differences. Base paper generally uses Dorian paper, but also coated paper containing ground wood pulp or deinking pulp base paper. Except for special purposes, most of them are used for advertising posters and inside pages of magazines. Therefore, even under the same reproduction conditions, the colors presented will vary greatly. Therefore, to improve the printing quality, it is necessary to master the influence of paper on color reproduction, and then use it on photographic color separation or printing machine Make appropriate adjustment to make the printing quality meet the demand.