Printing lithographic plate making process

Abstract

The invention relates to a printing lithographic plate making process, which specifically comprises the following steps: carrying out exposure: decomposing a photosensitizer in a blank part of a printing plate by using a plate burning machine; developing: dissolving the photosensitizer in the blank part of the printing plate by a developing solution by using developing equipment; carrying out gluing, specifically, evenly coating the surface of the printing plate with a layer of protective glue, and placing the printing plate in a darkroom to be naturally dried; inking: if the printing plate is not used temporarily, coating a layer of ink on the surface of the image-text part of the printing plate through a method of rolling ink by an ink roller, and if printing is carried out immediately, not inking; carrying out dirt removal: removing dirt or unnecessary parts on the surface of the printing plate by using a fountain solution; and baking: uniformly coating a layer of plate baking liquid on the surface of the printing plate, and then baking for 6 minutes at 230 DEG C. The developing efficiency is improved to a certain degree, and meanwhile, the protective glue is coated on the surface of the printing plate, so that the blank part of the printing plate has better hydrophilicity, the blank part of the printing plate is better moistened in the printing process, and printed patterns are not easy to deviate.

Description

technical field [0001] The present application relates to the field of plate making, in particular to a printing lithographic plate making process. Background technique [0002] There are various printing methods, among which lithographic printing is widely used due to its low cost and convenient plate making, but in order to carry out high-quality printing, high-quality plate-making must be carried out first, and a good printing plate must be obtained to improve the printing quality . Among the various methods of lithographic plate-making, the pre-coated photosensitive plate-making method, that is, the PS plate-making method, is gradually replacing the traditional planogravure plate-making method due to its simple operation, good quality, and long service life. According to the principle of use, the PS plate can be divided into a positive PS plate and a negative PS plate. In printing, the positive PS plate is used more. The photosensitive agent on the layout part is decom...

AI Technical Summary

Problems solved by technology

[0004] In view of the above-mentioned related technologies, the inventor thinks that the developer is only sprayed on the surface of the printing plate, and the decomposed photosensitive layer in the blank part of the printing plate is easy to accumulate on the surface of the printing plate, making it difficult for the developer to spray to the photosensitive layer inside the blank part of the printing plate. Infiltration, for which the printing plate needs to be sprayed with developing solution for a long time, which has the defect of low development efficiency

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