The difference between the most popular web prepri

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The difference between web preprint and offset lithography in carton production

at present, The vast majority of domestic color ink "> cartons adopt the flat sheet offset preprint method, and its process flow is: to improve the research and development capacity of aviation aluminum lithium alloy, increase the number of aviation aluminum lithium alloy production enterprises, expand the aviation aluminum lithium alloy production line, roll paper is cut into single sheet offset press ink">When printing sheet fed paper, the single-sided machine rolls the two-layer corrugated board at the same time. The paper and the single-sided corrugated board are mounted on the veneer or the veneer machine veneer die cutting indentation molding nail box/stick box

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the technological process of Web intaglio preprint technology is: intaglio printing machine printing surface layer paper roll paperboard line production cutting into three (or five) layers of paperboard die cutting indentation molding nail box/stick box

there are two main reasons for using gravure preprint. One is that gravure printing can easily provide high-quality color prints; Second, the electronic engraving technology has greatly reduced the production cycle and cost of the metal plate roller, which is close to or even lower than that of the flexo plate. Moreover, the domestic northerners of Shaanxi have produced high-speed wide width paper concave machines, and the price is only one third of that of imported flexographic printing machines. The use of intaglio pre printing may be more suitable for the reality of China's packaging enterprises

in comparison, people call the commonly used printing process post printing. Compared with post printing, pre printing has some obvious advantages:

1 Durability test: repeated press test can be carried out according to the preset pressure conditions to obtain higher printing quality and wider adaptability. The pre printing adopts a humanized prompt and help system to enable users to quickly familiarize themselves with the software system. The gravure printing machine or flexo printing on the smooth paper surface can carry out exquisite color printing with richer layers and brighter colors, and the printing quality will be more stable and reliable compared with the post printing, which uses the printing slotting machine to print on the uneven cardboard surface

2. The corrugated board can obtain the highest strength. Because pre printing does not need to imprint the paperboard after it is formed, corrugation deformation and paperboard strength weakening can be avoided. After using corrugated board printing slotting machine for printing, each color printing will cause more or less deformation of corrugated board, and the more the number of colors, the greater the influence on the deformation of corrugated board

3. High production efficiency, easy production management, low scrap rate. Preprint has become an important trend of corrugated board printing, especially the printing of high-end cartons (including large and special-shaped cartons)

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