Ningbo XISXI E-commerce Co., Ltd , https://www.xisxipetsupplies.com
1. Plate cylinder drive system wears out
Whether it is a shaft drive or a shaftless transmission, there are a series of mechanical transmission components in the transmission system. After years of high-speed operation, these parts will have a certain degree of wear and tear, which will cause the drum to have a certain degree of inclination. Therefore, the printing color is not accurate, and this color deviation is often not well solved by the circumferential and axial color adjustment.
2. Double diameter roller plate fixing clip appears deviation
Since most of the newspaper rotary machines use double-diameter rollers, that is, two plates need to be installed at the same time on one plate cylinder, and only one of the plates can be adjusted in the printing process, so one of them often appears. After the printing plate is normal, the other printing plate still has a deviation. In addition to the tilting of the plate cylinder, this phenomenon may also be caused by various factors such as plate making, plate loading, and plate mounting of the plate. It can also be tried by pre-press color compensation.
3. The printing machine foundation has some settlement
Because the printing machine runs at high speed for many years, the foundation of the load-bearing part of the printing machine may have different degrees of settlement. If the settlement is uneven, it will affect the printing color and it is difficult to be effectively solved.
The above content is selected from the 10th issue of “ Printing Technology·Digital Graphic Arts †in 2013. For more journal content, please pay attention to the journal channel. The latest journal content clicks into the electronic journal channel of Keyin.com.
Three factors that cause color misregistration in the press printing
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In the newspaper industry rotary machine, because the printing precision is relatively low, the printing speed is fast, the news paper has strong water absorption, the outlets are easy to increase, the tension is not easy to control, and the color control is quite difficult. In addition to enhanced maintenance of the press, the use of some automatic color registration devices during the printing process, etc., some relatively stable and predictable color deviations can also be compensated by prepress.