Non-graphical parts of printed images are cleaned with cleaning paste.

Graphical parts except dirty

During the printing process, when the printed sheet was drawn, it was found that the graphic part of the printed product was floating (stencil), and after stopping, the cleaning paste was taken with a wet rag, the stain on the printing plate was wiped off, and the wipe was wiped again with clean water. , and then start printing. In doing so, not only the work efficiency is low, but also the reboot of the machine will make the inks of the first few dozens of inks darker and more wasteful. In my daily work, the author summarized a method that can eliminate the floating of the printing plate without stopping the machine and ensure the continuity of the printing. The specific method: when the printing press is in normal printing, use a damp rag to clean the paste, and wipe the corresponding fountain roller according to the position of the plate from the dirty position. The cleaning paste on the fountain roller is transmitted through the chrome roller and the dampening roller. On the plate, the bleed on the plate immediately disappears. In doing so, the effect is very good, and it saves time, effort, and improves work efficiency.

Non-graphical parts except dirty

If there is ink in the circumferential direction of both sides of the plate or the non-graphic part of the plate, it should be removed in time. On the other hand, with the progress of printing, the ink may be enlarged. Once it is diffused into the graphic, it will cause waste. Second, the ink will be transferred to the impression cylinder via the blanket cylinder. The cleaning cylinder will be very clean. Hard work. In the past, the ink on the ink fountain roller corresponding to the non-graphic portion of the printing plate was "broken up" or the pad on the non-graphic portion of the blanket cylinder was cut off. The above method is effective in removing dirt, but the amount of cleaning paste should be increased. When shutting down, it is necessary to check whether the pressure of the ink roller and the dampening roller on the printing plate is correctly adjusted.