Manufacturing method of high-definition gravure wood grain printing plate roller

Abstract

The invention discloses a manufacturing method of a high-definition gravure wood grain printing plate roller, wherein image information with large data size can be obtained during the image input and transmission process, and the loss of the image information in all calculation processes during conversion and transmission can be reduced to the greatest extent. The manufacturing method comprises the following steps: (1) selecting wood grains, and adopting the conditions of using a 120mm high-definition lens, enabling the distance from the lens to a scanning platform to be 52 cm, and enabling the input resolution to be 2000dpi to scan the wood grains so as to get images with the large data size; (2) adjusting the resolution of the image with large data size to be 900dpi, further performing image transmission and image processing at 900dpi resolution, dividing the image into three parts according to a self-designed procedure, enabling three computers to simultaneously adopt a same command respectively, and simultaneously operating for performing connection, color separation and retouching treatment; and (3) merging the three parts of the image, reducing the resolution to 304.8dpi, and adopting a 60L / cm engraving line data transmission diagram for engraving.

Description

technical field [0001] The invention relates to the technical field of decorative gravure plate making, in particular to a method for manufacturing a high-definition gravure wood grain printing plate roll. Background technique [0002] With the continuous improvement of living standards, the decorative wood grain furniture manufacturing industry has put forward higher and higher requirements for the design and manufacture of decorative wood grain paper, which plays a leading role in the appearance and style of furniture. In addition to fancy styles and colors with a strong sense of the times, it is also required that the grain of the wood grain be clear, lifelike, natural, and have a high degree of simulation. It is difficult for ordinary wood grain paper to meet such high requirements, so it needs to be improved in terms of wood grain clarity and texture. [0003] At present, the technical process of making the gravure wood grain printing plate roller using wood as the ori...

AI Technical Summary

Problems solved by technology

[0005] ① Due to the different density ranges of various types of wood manuscripts, when the density is properly compressed, the density on the printed matter will inevitably shrink and the clarity will be lost; ② Due to printing ink, paper penetration, poor overprinting and screening, etc. The image outline or boundary is blurred, and the clarity will also be lost; ③ Due to the imperfect CCD technology of the platform scanner, some optical loss will occur through the lens system in the scanner, and the scanned image will be blurred than the wood original. Lose the clarity of some subtle levels of images; ④The process of image processing in software is complex and involves many procedures. After a large amount of data calculation by the computer, data will be lost in the process of repeated calculations, thereby affecting the clarity, especially for the image clarity obtained by using 304.8dpi resolution in the prior art

[0007] (1) Due to the low scanning resolution of the image input (609.6dpi), it is impossible to obtain image information with a large amount of data. At the same time, because the images are all transmitted through the network, there are many processes, and the image information is repeatedly calculated. There is a loss during transmission, thus affecting the performance of wood grain

[0008] (2) Engraving with ordinary lines (55L / cm) will cause loss of lithographic image information, and it is difficult to restore the fine layers to the printing plate roller through gravure printing cells

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