The effect of loose plate lock and its solution

In the process of printing, deinking often occurs. Once deinking, it will affect the production speed, and cause color separation and cardboard pollution.There are many reasons to cause printing deinking, generally it first comes to you is that the ink viscosity is too high or ink foam, but printing deinking is not necessarily the problem of ink, may be the printing plate is not installed tightly.Printing plate loosening is easy to cause deinking and burr of printing patternsWhen the operator installs the plate, the lock is not tight or the lock system of the printing press is loose. If the printing plate becomes loose during production, it will cause deblurring. The reason for this is due to the loosening printing plate, the plate base in the process of transission will be stained with ink, of course, printing ink transfer force is uneven in the process of production because of loose printing plate lock, this would cause ink dragging, resulting in deinking and blurry. Because the print plate is not locked, the plate base is easy to bulge out. It is stained with ink during operation and then transferred to the cardboard. The extra transferred ink is printed on the cardboard, but the printing plate if not locked, is prone to pulling, resulting in the printing deinking. Solution: lock up the print plate, check and clean regularlyIf printing plate not locked well, it will appear printing burr, color register inaccuracy. So in the production process, printing plate must be locked well, and regularly check and clean printing plate lock system, to ensure the normal operation of the locking system. 

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Why carton printing blurry and deinking in plum rain season?

During the plum rain season, printing is easy to deinking and blurring. The humidity of corrugated cardboard is high, due to the humidity weather, resulting in the cardboard become soft, the press must increase the pressure. When the ink transferred to the paper, due to the humidity, it is easy to form font expansion, giving rise to printing paste. In addition, corrugated board humidity will also cause the printing surface deinking. So how to control that?1. Pressure of printing press In rainy days paper feeding gap must be well controlled, it should be within -0.4 mm of cardboard thickness. Because the cardboard itself is relatively soft, if the paper feeding gap pressure is too tight, it will crush the cardboard, subsequent pressure has to be increased as well, which is easy to cause paste and deinking. Reduce the feeding pressure to ensure hardness of the cardboard. In this way the printing pressure can be reduced to ensure the clarity of printing.2. Ink High ink viscosity is also one of the important reasons for printing blurring and deinking. Therefore, in plum rain season, ink viscosity must be lower, and ink concentration must be high, so that the ink drying speed will be fast, printing paste and deinking can be avoided .      

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