This article focuses on how to print uneven cardboard from two aspects of pressure and ink adjustment.

Corrugated cardboard surface paper is uneven, and unevenness appears on the cardboard surface. It is not easy to make such a cardboard. When the printing pressure is high, the cardboard will have pits, and when the printing pressure is light, the printing will appear frequently. Generally speaking, after the uneven cardboard is produced, how to find the relevant problems in the printing process and solve it in a targeted manner will cause this kind of cardboard to be printed and wasted. So how do we solve such problems?

Pressure: Controlling pressure is particularly important

The printing pressure should not be too light: the pressure control of the uneven cardboard is a very important link. First, the printing pressure should not be too light. Colleagues who increase the printing pressure should press the plate to the lightest, so that the printing plate transfers ink while , The printing plate is not easy to deform, and the ink will not be stuck at the edge of the printing plate, the printing pressure is a bit larger, and the font will also be washed.

The pressure of the paper feed roller should not be increased: the paperboard cannot be crushed by the paper feed roller, so the adjustment of the paper feed roller gap should be controlled at -0.4mm of the thickness of the paperboard. If the cardboard is too heavy, it will collapse, which will increase the printing pressure. So the paper feed unit must be well controlled. If the plate pressure is also high, and the printing pressure is also large, there will be printing paste, unclear writing and other phenomena.

Ink: Let the ink penetrate into the paper better

The unevenness of the cardboard is caused by the uneven paper force, and the ink absorption is poor when the cardboard tension is tight. Therefore, for paper problems, it is necessary to increase the toner content of the ink, reduce the ink viscosity, and reduce the amount of ink. Then add penetrating agent in the ink to improve the penetrating ability of the ink and allow the ink to penetrate into the paper better, so the problem can be solved.

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