Recently, many friends have reported to our editor that when they are printing aluminum foil bags, they will always have various problems, and they don’t know how to solve them.
As an excellent packaging bag manufacturer, I naturally brought the following knowledge.
In printing, there are also the words surface printing and back printing. Pure Aluminum Bag Manufacturers So what are surface printing and back printing? Literally, surface printing is surface printing, so that the ink is easy to change color and easy to wipe off. The inner printing is through multi-layer printing, it is not easy to fade, and the color will not fade when scrubbed. Ink printing is done on the middle layer of the three-layer composite aluminum foil bag, and then the appearance is composited. Industrial aluminum foil does not print patterns and colors, of course, the same is true. It can be printed, and the pattern is printed, which has the effect of advertising and promotion. Let us take a look at the problems encountered in the printing process of aluminum foil bags.
Generally, there are three types of printing, namely gravure printing, flexographic printing and letterpress printing. Different printing methods are suitable for different printing quantities. Small batch printing.
If the ink is required to have strong adhesion and fast drying speed, you can use iron printing ink, resin-based offset printing fast-fixing ink or a mixed ink of offset printing and plastic ink. In general, a drier is needed to increase the drying speed. If it is gravure printing, Install a hot air drying device. Make a sample before selecting the ink on the machine to check whether the dryness and hue meet the requirements.
The printing process of aluminum foil bags also requires a large printing pressure. The purpose of pressure printing is because the absorption of aluminum foil is poor, and the barrier is strong. The pressure can make the printing plate and the surface of the aluminum foil contact in a larger area and force the ink to adhere. Zhexin The packaging company specializes in the production of baby feeding bags, food, daily chemical spout bags, self-supporting valve bags, bags in boxes, food packaging bags, special water bags and other packaging series.