Our company's technicians did on-site test without any adjustment of printing, and found that the phenomenon of reverse printing was not obvious within two hours of printing, and the fastness of printing patterns was also good, but as time went by, the printing pattern began to appear. Flowers, reduced gloss, insufficient attachment fastness, etc., and bite-coloring are also increasing. After the machine was shut down, it was found that a large amount of water droplets accumulated on the back of the blade, the viscosity of the ink in the ink tank increased, the fluidity was poor, and the phenomenon of swelling was accompanied. The solvent was re-exchanged and isopropanol: ethyl ester: butyl ester = 5:2:3, and arranged for printing at night, avoiding the time of operation of the self-adhesive coater and the high temperature during the day. From 9:00 pm to 6:00 the next day, there was no reverse shift in printing.
Experience summary: The external environment has a great influence on printing. Experienced printers know that when people feel comfortable with the environment, printing is relatively smooth. When people themselves feel bad, printing is prone to failure. The authors ask the users to do some proper control of the environment before the operation, such as temperature, humidity, ventilation, etc., to avoid similar situations. (Case Study / Yan Yongyue)
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