The influence of uneven printing plate thickness on printing durability

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1. On the same cylinder, the thickness of the first printing plate (the thickness at this time is only for comparison between the printing plates) is thinner than the thickness of the second printing plate, so when loading the first printing plate, the pressure The pad is adjusted according to the requirements of the first printing plate, but when the second printing plate is installed, because the thickness changes, the requirements also change. Although the printing plate is also tightly fixed on the drum, Due to the relative increase in the thickness of the printing plate, the pressure on the printing plate will become larger, and naturally it will be easily damaged, so that the printing resistance will be reduced accordingly.

2. On the same cylinder, the first printing plate is thicker than the second printing plate. When the first printing plate is installed, the pressure and pad are adjusted according to the requirements of the first printing plate, but the In the case of two printing plates, the pressure is reduced compared to the second printing plate. If the requirements for normal operation are not met, the graphics on the printed matter will become unclear. In this case, the machine will be damaged even if it is in normal operation. The printing plate affects its durability. If the plate was originally made with the regenerated positive figure PS plate, the printing plate made by the new positive figure YP-IIPS version was suddenly replaced halfway, but the pressure of the printing machine and the liner of the printing plate were not adjusted accordingly. The pressure will inevitably change, and the printing plate will be damaged.

Under normal circumstances, when the printing plate is replaced, and the printed plate made of the new PS plate is used to replace the regenerated positive PS plate, the machine must be readjusted. In addition, the suppliers who cannot change the plate material at will, and different manufacturers, the thickness of the base (aluminum plate) used in the positive version of the PS plate produced by them will inevitably vary. The thickness of the base plate of the Xinyangtu PS version is 0.3mm. Among them, the error of 0.02 ~ 0.03mm is difficult to detect with the naked eye, and can only be measured with the aid of a micrometer. Therefore, it is best for printing companies to stabilize the supply channels of raw materials, and do not replace them frequently, otherwise it will make the operator feel inexperienced and not conducive to work.

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