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What are the common problems of gravure blockage?

In gravure printing, the phenomenon of blockage is generally as follows: the shallow dot version cannot be transferred; the ink transfer amount of the deep dot version is reduced, which can usually be obtained from50%~70%Fall to20%~30%.cause:1. During printing, the viscosity of the ink increases due to the volatilization of the solvent, so that it cannot enter the small cells or lines, so that the ink gradually dries and solidifies, resulting in blockage;2During printing, the distance between the squeegee and the plate cylinder is too large or the angle is unreasonable; due to the large diameter of the plate cylinder or the insufficient depth into the ink groove, the hot air blown from the drying equipment affects the plate cylinder, which will also cause blockage. Version;3, The depth of the engraving of the printing plate cells and the angle of the cells are not suitable;4, The printing environment temperature is too high, so that the solvent volatilization speed is too fast, resulting in blockage;5. The ink with the curing agent series is added, and the ink is solidified in the printing plate mesh with the extension of the machine time, which gradually reduces the depth of the printing plate and causes the plate to block;6The design of the ink formulation is unreasonable, and a container that dries too fast is used.

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