The problem related to printing is that you need to communicate with the plastic bag manufacturer in advance about the grade of the ink used in printing. It is recommended that you should use the ink with environmental protection certification. The plastic bag printed with this ink has less smell and is safer.
If it is a transparent plastic packaging bag, you do not need to print this step. You can directly start the following process flow.
There is a special screen at the end of the printing machine to check whether there are errors on the roll film under color printing. After starting up and printing a part of the color printing film, some samples are often torn off from the film, inspected by the color printing master, and handed over to the customer for inspection to check whether the plate is correct, whether the color is accurate, whether there are previously undetected errors, etc, Continue printing after the customer signs.
Different bag types have different bag making methods
It should be pointed out that due to errors in the display or printed version, sometimes the color actually printed will be different from the design version, but at the beginning of the printing work, if the customer is not satisfied with the printing color, it can be adjusted at this time. This is also why plastic packaging bag manufacturers generally require customers to go to the factory to see the color before printing Reasons for sample signing.
Plastic packaging bags are usually composed of two or three layers of raw material films. The printing layer is a layer of bright film or matte film. After that, the printed film is combined with other packaging films of different grades and materials. The composite packaging film also needs to be matured, that is, the composite packaging film can be dried by adjusting the appropriate time and temperature.
Very small plastic bags can be printed in line
4、 Bag making.
Different types of plastic bags have different ways of making bags. Various types of plastic bags, such as three side seal, four side seal, self-supporting bag, eight side seal and so on, are reflected in the process of making bags. Bag making is to cut and stick the printed packaging bag roll film into a complete plastic packaging bag according to the size and bag type of plastic packaging bag. If you customize the roll film of plastic packaging bag directly used on the automatic packaging machine, there is no link of bag making. When you use the roll film, you can complete a series of work such as bag making, packaging and sealing.
5、 Packing and transportation.
Plastic packaging bag manufacturers will pack the produced plastic packaging bags according to a certain quantity and send them to customers. Generally speaking, plastic packaging bag manufacturers have the service of nearby delivery, but if logistics delivery is required, the strength of packaging materials should be considered when packaging to avoid damage to goods.