Three Reasons and Solutions for Easily Printing Plates

[Chinese Packaging Network News] In the printing production process, printing plates often appear plug version, once the plug version not only reduces the printing quality but also greatly affect the printing efficiency. Once the stencil increases a lot of down time, the production efficiency is low, and at the same time, the loss of the film production is also caused. How to solve the plug version problem.

In the printing production process, the printing nets often appear stencils. Once the stencil printing not only reduces the printing quality, it also greatly influences the printing efficiency. Once the stencil increases a lot of down time, the production efficiency is low, and at the same time, the loss of the film production is also caused. How to solve the plug version problem.

In general, fast consumer product packaging outlets are more and more delicate, so what caused the emergence of plug version? We usually find that it is the ink and printing plate and the operation caused by the stencil.

Ink

1. Insufficient ink flowability During printing production, some operators like to adjust the ink cartridge back to the ink to slow down, so that more ink is stored between the anilox roller and the rubber roller. This practice applies to full-page printing, because the slow flow of ink leads to an increase in the amount of ink on the printing plate, but printing dots or fine prints can appear to be blocked.

Solution: Prevention of printing plates must speed up the fluidity of the ink, which can be solved by adjusting the pressure of the ink supply pump.

2. The ink dries too fast When the ink is transferred from the anilox roller to the printing plate, the printing plate is transferred to the film again. Since the ink dries too fast, the ink dries on the printing plate so that the accumulation of the ink is formed on the printing plate. Plug version phenomenon.

Solution: This kind of situation is better to judge, when rubbing the printing plate, the ink on the printing plate is more difficult to wipe, is generally caused by the ink drying too quickly, can be solved by adding new ink or adding a slow drying agent.

3. Ink viscosity is too high If the viscosity of the ink is too high, it can also cause plug printing. The reason is the same as the reason for poor fluidity. Reducing the viscosity of the ink can be solved.

Again, the dust and paper dust in the ink fall into the ink, and the dust is transferred to the printing plate by the ink system. It is possible to install a filter in the ink inlet tube. The screen mesh can be used at 120 mesh. To control the printing viscosity and improve the color density of printing, the general viscosity control is appropriate for about 9 seconds.

The printing plate does not match the anilox roller

The printing plate is mainly due to the mismatch between the printing and the anilox roller. If the 300-mesh anilox roller is to print an 80-line pattern, then the ratio will be often blocked, because the mesh point of the 300 mesh is too large, and the ink is too large. The transfer amount of the assembly resulted in too much ink on the printing plate, causing the printing dot plate to be blocked, resulting in a mismatch between the printing plate and the anilox roller.

Solution: The conventional ratio is 1:4.5. This ratio is reasonable.

Staff error

Personnel operation is mainly due to the pressure is too large resulting in deformation of the printing plate, resulting in the expansion of printing dots, and the resulting network of plugging, printing pressure gap is generally about 0.1-0.2 mm in film thickness.

Method of Liberation: Training of production operators is required to prevent printing plugs caused by excessive printing pressure.