Carton preprint quality problems explain eight

8. Inadequate adhesion of the printing ink layer and poor adhesion of the printing ink layer can be classified into the following types: insufficient imprinting of the abrasion resistance; insufficient imprinting of the low light fastness; insufficient chemical resistance Imprinting is not strong.

1. Due to the overabsorption of the surface of the printed product, the excess binder in the printing ink layer penetrates into the capillary structure of the substrate, resulting in that the pigment in the printing ink layer does not have enough binder to consolidate the film and protect it, thus producing The phenomenon of discoloration of the imprinted powder has disappeared.

2, due to semi-finished products in the post-press processing, such as light machine, folder gluer, cover machine operation, due to the presence of friction, so that the printing ink printing ink layer appears fade phenomenon.

3, due to the printing ink layer is not fast, in the strong light or UV process environment, it is prone to fading.
4, due to the lack of chemical resistance of the printing ink layer and the color of the imprint or imprinting is not strong. When the printed product is in contact with the packaged acids, alkalis, salts, soaps, greases, alcohols and other chemicals, fading occurs easily.