Settle these 8 major quality problems of Paper Box, the print version is free for you to play

Settle these 8 major quality problems of Paper Box, the print version is free for you to play!

1. Network blockage

The phenomenon of printing dot clogging is relatively common, and the dot clogging has a certain relationship with the printing plate. When the printing plate is made, the number of lines of the anilox roller and the printing plate do not match, and if it is made too high, the phenomenon of jamming will occur. Generally, the ratio of the anilox roller to the printing plate is 1:4.5, that is to say, the anilox roller is 250 mesh, and if the network line reaches 65 lines, the phenomenon of dot printing will be blocked.

Second, the printing is white

The hardness of the printing plate is higher than 45 degrees, and it is very easy to appear white printing when printing large color blocks. Since the hardness of the printing plate is too high, the ink transfer of the printing plate will be reduced, which means that the amount of ink used will be directly reduced, resulting in that the paper cannot get enough ink covering layer, causing the phenomenon of printing whitening.

Third, the color is not allowed

During the production process of the printing plate, the wrong scaling ratio or the different bleeding of the printing plate will also cause inaccurate color registration. The scaling ratio of the printing plate is calculated according to the circumference of the printing machine cylinder. If the calculation is wrong, the size of the pattern will change, resulting in inaccurate color registration.

Fourth, the printing is not clear

The unclear printing is mainly reflected in whether the printing pattern has been printed, and some have been printed. This is mainly due to the poor flatness of the printing plate during the plate making process, and the phenomenon of high and low levels. This situation can be said to be very common. . Generally, in such a situation, only use tape to raise the back of the printing plate to make the printing surface flat.

5. Printing ghosting

The printing ghost caused by the printing plate is mainly because the edge of the printing plate is not smoothed during the printing process, which leads to the printing quality problem caused by the outward extrusion of the printing plate, and also the phenomenon of printing burrs. Version.

6. Printing errors

In the process of cardboard, there are errors in the content of the printed patterns. The common ones are text errors and less printed patterns. The solution to this kind of method can only be improved by improving the carton inspection ability of the printing press personnel.

Seven, the printing plate position is incorrect

The incorrect position of the printing plate is mainly caused by human factors. In the process of making the printing plate, the typesetting position is not placed in the designated position, resulting in incorrect printing position. Solving such problems requires careful checking of printed manuscripts by press personnel.

Eight, printed text paste

There are similarities between the printed text and the unclearness, but the most common cause here is the problem of the plate making process, especially when the text is relatively small, the washing depth of the printing plate is too shallow when the printing plate is washed, and the ink will accumulate after printing. At the printing edge, it is easy to block the printing plate, resulting in smeared printed text. Once such a problem occurs, it can only be solved by reproducing the printed version.

Summary: formulate reasonable management methods for printing plates to avoid quality problems

Of course, the problems caused by the printing plate are far more than these. If the printing plate is too soft, it will also cause the printing to be blurred or unclear, and the wear of the printing plate will also lead to other problems. Therefore, the quality of the printing plate is directly affected by the production of the printing machine. efficiency and quality. In order to avoid similar quality problems, each factory must formulate reasonable printing plate management methods to avoid unnecessary troubles in production caused by quality problems caused by printing plates! 

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