The Composition and Function of Chromatography in Book Printing

In color printing, the color of general objects is regular. The China printing company summarizes the pertinent and usable chromatogram rules in the actual printing production work, which is generally called printing chromatogram. The appearance of printing chromatogram provides printers in China to reference, making printing more convenient, fast and accurate. Do you know the knowledge of special printing chromatography? If you don’t know, let’s learn about the knowledge of special printing chromatography.

(1) The composition of the printed chromatogram.

The chromatograms printed by various book printing companies include the following four parts: single-color, two-color, three-color, and four-color parts. Due to the differences in conditions and application objects, there are certain differences in their composition, color block display method and color block quantity. In general, the application of chromatographic analysis will specifically introduce the manufacturing and printing conditions of the chromatogram, the materials used, the required technical parameters, and basic data.

Elucidation of Chromatography. In the explanation of chromatogram, it introduces the basic structure of chromatogram, chromatographic ladder, screen angle, printing paper, ink and other materials, data test and test data, etc. In the monochromatic part of the large part of the color spectrum (four-color part), the yellow cyan is divided into 3%, 5%, 10%, 15%, 20%, 30%, 40%, 50%, 60%, 70%, Thirteen levels of 80%, 90%, and 100%. Black is divided into nine levels: 3%, 5%, 10%, 15%, 20%, 30%, 40%, 50% and 60%. In this way, various monochromatic colors of shades can be obtained. The two-color part is to combine the three colors of yellow, magenta and cyan. The two primary color ladders are arranged horizontally and vertically. Every two primary colors can form 13×13=169 colors, which can be combined into a total of 169× 3 = 507 secondary colors. The three-color part is that on the basis of the two colors (magenta, cyan), the third primary color (yellow) and black are superimposed to form the third color. There are a total of 6084 colors in the color block. In the four-color area, the four-color inks of yellow, blue, and black are superimposed according to the different dot area ratios of each ladder, and 18,804 colors are superimposed.

(2) The role of printing chromatography

Chromatography has become a common color representation method in the printing industry due to its intuitiveness and practicability, and it is a color reference tool with instructive significance for multiple processes. Its use is conducive to the standardization, digitization and standardization to the printing process. The customer’s business personnel can know the color reproduction effect that can be obtained under the existing conditions of the factory from the chromatogram; the photographic color separation personnel can analyze the original according to the chromatogram and make the corresponding mask; the electronic color separation personnel can use the chromatogram to analyze the original. Calibration; Proofing and inking personnel can allocate spot color inks required for various color prints according to the chromatogram; printers can evaluate the quality of color prints according to the color rendering effect of various papers and inks in the chromatogram.

Theoretically speaking, the printing chromatogram can only be used for the reproduction process under the same conditions as paper, ink, plate-making process and printing process. Because the process of chromatographic printing involves many variable factors such as raw materials and various printing related conditions, only in the specific environment of our factory, we can use our existing color separation, screening, revision and printing. , proofing, printing equipment and commonly used raw materials such as photosensitive film, printing plate, paper, ink, etc., only by exerting the technical level of the operators in each process of the factory can we print the chromatogram that has practical guiding role and reference value for the factory. In addition, with the passage of time, the physical and chemical properties of ink and paper will change, which will reduce the reference value of the chromatogram. Therefore, the printing chromatogram should be updated regularly, and the types and equipment models of various raw materials used in the printing process should be updated. Wait for the data to be recorded in detail.

Special printing chromatogram is very important in the production of printing industry. Understanding of special printing chromatogram is more convenient for the development of printing work. Of course, different book printing companies in China are also different. This is mainly based on the different experiences summed up by different companies. It comes out, and the special printing chromatogram is also in the continuous development process. It has new changes and new chromatograms with the development of the printing industry, which all require us to have a further understanding of it.