On the practicability of printing chromatography

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Talking about the practicability of the use of printing chromatography

the printing chromatography used most in the printing industry at home and abroad is the special printing chromatography for this industry. According to the characteristics and requirements of the printing industry, printing chromatography gathers a large number of actual color samples for classification and arrangement, which is more targeted and practical in the actual printing production

printing chromatography, also known as printing grain chromatography, is the sum of color blocks of various colors printed with standard yellow magenta black four-color ink according to different dot area rates

in the printing process, color image reproduction is usually made by overprinting three primary colors of ink plus black ink with dots of different sizes. In this printing process, printing chromatography plays a great reference and guidance role in plate making, proofing, inking, printing and other processes

(1) composition of printing chromatography

the chromatograms printed by various manufacturers contain the following four parts: monochrome, two-color, three color and four-color parts. Due to different conditions and objects of use, their composition, the arrangement of color blocks and the number of color blocks are also different to a certain extent. The deposit system was successfully promoted in the recycling process of primary plastic lunch boxes. Generally, in the instructions for the use of the chromatography, the production and printing conditions of the chromatography, the materials used, the main technical parameters, basic data, etc. will be introduced in detail

thematic map chromatogram is designed for maps, especially thematic maps, and is divided into two major parts: the four-color part and the spot color part

instructions for filling wine chromatography in wooden barrels. In the description of chromatography, the basic composition of chromatography, chromatographic ladder, angle, printing paper, ink and other materials, data test conditions and test data are introduced

in the monochrome part of the first part (four-color part) of the chromatogram, yellow Indigo is divided into 13 levels: 3%, 5%, 10%, 15%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90% and 100%, and black is divided into 3%, 5%, 10%, 15%, 20%, 30%, 40% and 50%. The electric motor system driven by frequency converter is more and more used because of its obvious energy-saving effect, convenient conditioning, simple protection, networking and other advantages, 60% nine levels. In this way, we can get various monochromatic colors with different shades

the two-color part is to combine the yellow, magenta and cyan colors in two. The two primary color ladders are arranged horizontally and vertically respectively. Every two primary colors can form 1313 = 169 colors, and a total of 1693 = 507 secondary colors can be combined

the three color part is to combine the third primary color (yellow) and black on the basis of two colors (magenta and cyan). There are 6084 colors in the color block

in the four-color part, the Yellow magenta black four-color ink is superimposed according to the different point area ratio of each ladder, and 18804 colors are overprinted

(2) the role of printing chromatography

chromatography has become the most commonly used color representation in the printing industry because of its intuitiveness and practicality, but it is a very cheap method. It is a color reference tool with guiding significance for multiple processes. Its use is conducive to the standardization, digitization and standardization of the whole printing process. The customer's business personnel can know the color reproduction effect that can be obtained under the existing conditions of our factory by chromatography; The photographic color separation personnel can analyze the manuscript according to the chromatography and make the corresponding mask; Electronic color separation personnel can calibrate according to chromatography; Proofing and inking personnel can deploy spot color inks required by various color prints according to the chromatography; Printers can evaluate the quality of color prints according to the color rendering effect of various papers and inks

in theory, printing chromatography can only be used in the reproduction process with exactly the same conditions of paper, ink, plate making process and printing process. The printing chromatography is best printed by each printing manufacturer under the specific conditions of the factory. Because the printing and production process of chromatography 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, addition, revision, printing, proofing, printing equipment, as well as commonly used photosensitive film, printing plate, paper, ink and other raw materials, Only by giving full play to the technical level of the operators in each process of our factory can we print the chromatography that has the most practical guiding role and reference value for our factory. In addition, over time, the physical and chemical properties of inking and paper will change, which will reduce the reference value of chromatography. Therefore, the printing chromatography should be updated regularly, and the types of raw materials and equipment models used in the printing process should be recorded in detail

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