Flexo printing is being applied more and more to film printing. Compared with gravure printing, flexo printing has more unique characteristics. To obtain a good flexographic printing effect, it is necessary to clearly understand the different printing effects of various processes influences. Among them, making a good flexible plate is a very important link. This also requires that plate-making personnel must understand the impact of various process technologies on the final printing results. Therefore, plate-making personnel must learn to analyze the process of flexographic printing plates to produce high-quality flexographic printing plates.

1. Features of flexo printing process

The printing plates of the flexographic printing process are made with rubber plates or with solid or liquid resin plates. The materials are different, and the printing performance and printing quality effects are also very different. Because the plate has the characteristics of flexibility, the printing pressure is light, and the printing adaptability is strong, it can print thick corrugated cardboard and thin and soft plastic film; it can print paper towels with strong absorption, and Can print non-absorbent aluminum foil and other materials. Because the liquid ink with strong fluidity is used for printing, and the plate material is soft and smooth, it can better overcome the printing defects of the rough surface of the material, and then obtain a thick ink layer and colorful printing quality effect.

The printing machine of the flexographic process can also combine offset printing, gravure printing, silk printing and other post-press finishing processes online, which has strong splicing flexibility and high printing production efficiency, which can better shorten the production cycle of the product and meet the urgent needs of users. In addition, because the flexo printing process uses non-toxic and odorless water-based ink for printing, it can effectively prevent product pollution during the production process. The printed products have the advantages of cleanliness, sanitation, safety and environmental protection. It is an ideal printing process for achieving green packaging. Suitable for the printing of medicine and food packaging products.

However, the flexo printing process also has shortcomings, that is, due to the softness of the plate, the dot expansion value is relatively large. Due to the inherent characteristics of the flexo printing process, the printing plate is prone to deformation defects. Therefore, it is necessary to pay attention to properly adjust the structure of the printing plate during plate design and printing, such as the size of the dots, the level, the thickness of the lines, the direction, and the gap of the plate, etc. .

Editor in charge: Liu Qingqing

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