The commonly materials used for paper bags are: white cardboard, kraft paper, coated paper, special paper and so on. When making a tote bag, the merchant usually prints the pattern and advertising slogan on the paper bag, and then uses the laminating process. Only after lamination, the pattern on the paper bag can be kept longer and the paper bag will be more durable.
Coating means that the transparent plastic film is applied to the surface of the printed matter by hot pressing to protect and increase the gloss. The film is a main process of post-press processing, requiring the surface to be clean, flat, not blurred, wrinkle-free, and non-foaming.
After the bag is coated, it can protect the paper bag from wear and tear, make the printed pattern brighter and less likely to be damaged, thereby extending the life of the bag. At the same time, the plastic film can also protect against moisture, water, dirt, abrasion, folding and chemical corrosion.
The effect of different laminating processes is also different. If it is a sub-film, the color of the paper bag will be darker than the front of the film, which is more stable and elegant, and the film will make the paper bag more vivid and brighter.
The laminating process has been widely used in the printing industry. Common laminating packaging products include cartons, paper boxes, handbags, and self-adhesive labels.
