In view of the following common printing errors of packaging boxes, a summary is made:
Question 1: The size is not right and displacement occurs.
Dimension problems usually arise from the deviation of slotting knife position, or small displacement of machine in the operation process. It is also possible that irregular paper and bending phenomena result in the deviation of final packaging box size.
Solution: Can adjust the position of slotting knife proofing debugging, if it is caused by paper bending, paper can be leveled, general paper warehouse need to ensure a certain humidity, so more conducive to paper storage, paper in a humid environment, the part that contacts the air will absorb water while the part that does not contact the air will cause paper bending because of moisture evaporation. ;
Question 2: Blurred typeface
Generally, the printing font is blurred, mostly because the ink is too dense and the viscosity is too high, which results in the uneven ink rejection and the formation of ink linking effect. It may also be that the ink is too thick, without drying, the paper overlap causes ink linking.
Solution: When adjusting ink, pay attention to the consistency of ink, of course, also need to pay attention to the pressure relationship between printing cylinder and pressure roller, in short, pay attention to some details of debugging;
Question 3: Line-pressing burst of paper;
Some papers will crack when the force is uneven or the pressure exceeds the limit.
Solution: Pay attention to the humidity relationship of paper, too dry paper is weak and easy to crack, paper pressure should not be too large, pay attention to test the tensile strength of paper before purchasing paper.
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