cause:
(1) The ink contains water, and the ink is solvent-based;
(2) Adsorption of moisture on the printed substrate film;
(3) The temperature in the printing environment is too high. This phenomenon is most common in the printing of nylon film. At this time, the nylon film is highly hygroscopic. The nylon film is made of aluminum foil with a thickness of 20 μm or more, and then it is shipped after being sealed and sealed. In contact with the air, the moisture in the air will soon be absorbed. After the nylon film is seriously hygroscopic, the ink cannot be printed on the film.
The solution is to move the printing plate back one unit and empty the first unit on the printing machine so that the nylon film is dried on a dryer in hot air at 50-60°C and then printed. Can solve the above problem. ("China Packaging News and Printing Weekly")