1. Prints with poor flatness are prone to wrinkles when coated, and due to the unevenness of the paper, the adhesive cannot be evenly coated on the paper, resulting in film peeling and blistering.
2. The product should be stored for a period of time after printing to facilitate the evaporation of paper moisture. Otherwise, after the film is laminated, as the moisture evaporates, the paper fibers shrink, which will cause the film to wrinkle.
3. If the surface roughness of the printed matter is too high, it will affect the castability (leveling and spreading) of the adhesive, resulting in uneven coating, and the product surface after coating will produce bright spots or "fogging" with different gloss.
4. It is inevitable to use chemical syrup in the printing process, and it is easy to change the surface structure of the paper, so that the adhesive and the paper can not be in good contact, resulting in the product foaming after being placed for a long time.
5. The automatic laminating machine dries the adhesive layer on the surface of the printed matter to the initial dry state when the peritoneum is on, and the thickness is about 0.002mm~0.003mm. Therefore, if the powder sprayed on the printing material is too thick, the film will be thin and the product will appear thin Snowy spots.

6. If the ink layer on the surface of the printed product is too thick or not dry, the adhesive applied by the automatic laminating machine during the lamination cannot penetrate through the pores between the ink layer and the paper to bond, and false bonding will occur, resulting in The finished film foams in a short time.