How to solve the printing dew white of Cigar Paper Boxes? A few ways to help you

How to solve the printing dew white of Cigar Paper Boxes? A few ways to help you

During the Cigar Paper Boxes printing process, it was suddenly found that the printing was white, so the operator began to increase the printing pressure! If the printing pressure gap is 4 mm, reduce the gap to 3 mm, and it will still be white; continue to increase the printing pressure and adjust it to 2 mm. At this time, the cardboard has been flattened and the printed fonts are blurred, but the printing is still white...

So the head of the printing press hurriedly called for management personnel to study the cause of Lubai. Ink problem? Cardboard problem? Equipment problem? Time passed by minute by minute, so it took a lot of time and energy, and the problem was still not solved. In fact, it is not that the problem is difficult to solve, it is that we have wrong methods in operation, and we always start to adjust when problems occur.

So how to avoid printing white of Cigar Paper Boxes and solve the problem of printing white?

First, the preparation before printing is inevitable

1. Check the ink viscosity before the ink is put on the machine, whether it is normal

The common problem of printing whitening is that the viscosity of the ink is too low, which is more likely to occur after repeated use. Because in the production process, the printing staff often add water to the ink barrel, which causes the ink viscosity to drop. This will cause the printing to be white, so the ink must be tested before the machine is installed.

2. Check whether the printing plate is in good condition

If the printing plate is used for a long time or the ink is too dirty on the printing plate, the ink transfer amount of the printing plate will be reduced. When the ink transfer amount is reduced, the printing white phenomenon will often occur.

3. Anilox roller

The cleaning of the anilox roller directly affects the printing situation. A large part of it is that the anilox roller is blocked and has not been cleaned up, so that the ink carrying capacity of the anilox roller is small, which leads to the phenomenon of printing whitening.

2. Learn how to eliminate whiteness in printing

1. First check the thickness of the unprinted cardboard, and then check the thickness of the cardboard after the cardboard comes out of the feeding unit to see if the cardboard is crushed by the feeding roller. If it is crushed, solve the problem of cardboard crushing first, and the paper feeding gap is the thickness of the cardboard -0.3mm.

2. Check whether the printing plate pressure is normal, and you can check whether there is enough ink on the printing plate. The hardness of the printing plate is suitable for a solid plate at 34-36 degrees.

3. If all of the above are correct, increase the printing pressure value. The pressure value should not be too large. If the pressure value is too large, it is easy to produce printing paste, and the printing slow wear will speed up.

Of course, if the viscosity of the printing ink is correct, the printing plate and the anilox roller are good or the printing white phenomenon occurs, the main adjustment direction is dominated by the ink process, and the printing pressure should not be increased all the time, you can continue to improve the ink viscosity and ink permeability. It is also possible to adjust the printing press to print in the interlaced state.

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