Problem to be solved: to realize a table printing on a plastic packaging material made of plastic film by using an aqueous ink-jet ink to realize a speed up of printing process.After printing the pattern and / or the character 1 on the surface of the plastic film s which is to be placed on the front side of the plastic film s to form the packaging material for the food, the ink jet printing is carried out with the ink jet ink. The ink jet inks 2 are printed by ink jet printing.Diagram
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