Hard scratched plate processing
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When printing large quantities of prints, you need to clean the plates and blankets for every 3000 impressions or paper loads. Sometimes the cloth that cleans the plate is covered with a hard object. If you don't pay attention, the plate will be marked with a line of dirty marks. Re-printing version, lost time, wasted and wasted; using the repairing paste, because the dirty marks are not coated with the photosensitive glue, it can not be repaired.
Treatment: Use a clean cloth to clean the cream, then apply a little moisturizing powder and gently rub a few times on the dirty marks. When the machine is turned on, the plate is first watered and idling a few times, then the ink roller is pressed, and the dirty marks are gone.
It can be seen from this that you should not underestimate the importance of rag cleaning.