An Analysis of the Flexo Printing Process of Tobacco Packaging in China

First of all, the domestically introduced narrow-width flexo press is mostly a 6+1 color group. The last color group is used for polishing, which can exert the advantages of flexo printing on spot color printing; secondly, the current domestic flexographic plate-making factory A set of effective flexo platemaking process methods has been explored that can basically meet the requirements of the hierarchical printing. In addition, flexo printing with on-line indentation, hot stamping, die cutting and other workstations, high production efficiency. In addition, the use of water-based inks for flexographic printing can be a big issue in environmental protection.

In the formulation process of the cigarette pack flexo printing process, the plate making process is determined according to specific process conditions such as paper smoothness, anilox roller parameters, ink gray balance data, etc.; in the printing process, due to the viscosity of aqueous ink, Dryness is affected by the pH value, so the pH value of the ink must be strictly controlled; considering that the flexographic printing dot enlargement is more serious than the offset printing, like the offset printing, the printing pressure must be adjusted to the minimum.

Here are a few hints as follows: Since the ink is transmitted through the anilox roller, the amount of ink required for printing on the ground and in the lithography is not the same. Therefore, the same color in the field and on the cable should be separately plated; due to the angle of the anilox roller Mostly 60 °, so the level of screening angle should avoid 60 °, in order to prevent the appearance of moire; taking into account the ink drying method is volatile dry, in order to enhance the contrast, it is recommended to use the printing sequence of K → CM → Y, and finally Printing spot colors; as an anilox roller for flexo printing "heart", it must be able to meet the needs of cigarette pack printing.