How to judge the quality of the nozzle bag?
2024-07-03
As a printer in the printing industry, you will be taught to identify the quality of the nozzle bag by observing the uniformity of the appearance:
First observe the stiffness of the suction pocket. Generally, the higher the flatness, the better, except for the different needs of materials. For example, when the bag is made of nylon and high pressure film, the heat seal of the nozzle bag will be wavy; It is also necessary to observe whether the cut edges of the bag are neat, the neater the better.
Packaging material knowledge: improper selection of ink for reverse adhesion in flexible packaging printing.
Some printing plants often only pay attention to the price of ink, blindly choose low-cost ink to reduce costs, and neglect the printability of ink. If the ink used is poor in printing suitability, it will often make the ink poor adhesion or poor drying, resulting in the ink naturally falling off after winding or causing adhesion on the back of the print. Therefore, when selecting the ink, pay attention to the instructions for the use of the ink to ensure that the performance of the selected ink meets the printing requirements. In addition, the adhesion of the ink should be tested during printing to ensure that the requirements can be met before batch printing.
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