This article focuses on how to print uneven cardboard from two aspects of pressure and ink adjustment.
The corrugated cardboard paper is not flat, and the appearance of the cardboard is uneven. It is not so simple to manufacture such a paperboard. When the printing pressure is high, the cardboard will be pitted, and when the printing pressure is light, the printing whiteness will be frequently displayed. Generally speaking, after the uneven paperboard is produced, how to print the link does not find the relevant problem points, and the targeted treatment will form such a cardboard can not be printed and spoiled. So how do we deal with such problems?
Pressure: handling pressure is especially important
The printing pressure should not be too light: the control of the uneven pressure of the cardboard is a very important part. The primary printing pressure should not be too light. The partner who increases the printing pressure should press the plate to the lightest, so that the printing plate carries the ink together. The printing plate is not simply deformed, and the ink does not get stuck at the margin of the printing plate. The printing pressure is a little higher and the font is also cleaned.
The pressure of the paper feed roller should not be increased: the paperboard cannot be crushed at the paper feed roller, so the adjustment of the paper feed wheel gap should be controlled at -0.4 mm of the thickness of the paperboard. If the heavy cardboard is crushed, it will cause the printing pressure to increase. Therefore, the paper feed unit must be handled well. If the plate pressure is also large and the printing pressure is also large, the printing paste will be presented, and the handwriting is not clear.
Ink: Let the ink penetrate better into the paper
The formation of the cardboard is uneven, because the paper surface is not uniform, and the ink absorption is poor when the paperboard tension is tight. Therefore, for the paper problem, it is necessary to increase the toner content of the ink, reduce the viscosity of the ink, and reduce the amount of ink. Then add a penetrant into the ink to improve the ink penetration ability, so that the ink is better penetrated into the paper, so that the problem can be dealt with.
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