Gravure printing unevenness can be divided into two types: gradient unevenness and shallow unevenness. Gradient gradation printing unevenness is mainly because no matter how to choose the engraving process in the plate making process, it is not possible to avoid the areas where dots are easy to produce gradation. Although the areas that can be changed by gradation through adjustment of the viscosity of the ink during the printing process, Unable to avoid the occurrence of network consolidation. Therefore, gradient uneven printing is difficult to control in the production process. It is best to choose a better engraving process during plate making to reduce the strange printing unevenness caused by the grading phenomenon. The unevenness of shallow printing is mainly caused by the following reasons: 1. It is a group of knife filaments unevenness caused by the ink viscosity is too high or the solvent evaporation rate is too fast during the printing process. Second, the viscosity of the ink is too low during the printing process, resulting in uneven printing of the printed products during the lamination process, resulting in uneven printing. 3. The printing plate cylinder is rough and has burrs, which causes uneven scraping of the scraper. Therefore, the following methods can be used to solve the uneven printing of the shallow layer: appropriately reduce the evaporation rate of the solvent and increase the slow drying solvent; appropriately increase the temperature of the printing workshop and reduce the temperature of the printing workshop; choose better quality ink and plate cylinder . Inkjet Machine Accessories
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Gravure printing uneven printing and solutions