Common knowledge of domestic cigarette pack flexo printing process

First of all, the narrow-width flexo printing machines introduced in China are mostly 6 + 1 color groups, and the last color group is used for glazing, so that the advantages of flexo printing in spot color printing can be exerted; second, the current domestic flexographic plate-making factories A set of effective flexographic plate-making process methods have been figured out, which can basically meet the requirements of layered plate printing. In addition, flexographic printing is often equipped with online indentation, bronzing, die-cutting and other stations, with high production efficiency. In addition, flexographic printing uses water-based ink, which can make a big contribution to environmental protection.

In the process of formulating the cigarette pack flexo printing process, the plate-making process should be determined according to specific process conditions, such as paper smoothness, anilox roller parameters, and ink gray balance data. In the printing process, due to the viscosity of water-based ink, Dryness is affected by the PH value, so the PH value of the ink must be strictly controlled; considering that the expansion of flexographic printing dots is more serious than that of offset printing, as with offset printing, the printing pressure must be adjusted to a minimum.

Here are a few tips as follows: Because the ink is transferred through the anilox roller, and the amount of ink required for field and gradation printing is different, therefore, the same color of the field and the screen should be made separately; due to the angle of the anilox roller It is mostly 60 °, so the screen angle of the gradation version should avoid 60 ° to prevent the appearance of moire; considering the ink drying method is volatile drying, in order to improve the contrast, it is recommended to use the printing color sequence of K → CM → Y, and finally Printing spot color; the anilox roller as the "heart" of flexographic printing should be configured to meet the needs of cigarette pack printing.

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