The ink absorption of base paper has a great impact on the printing quality of Food Boxes For Sushi carton products

The ink absorption of base paper has a great impact on the printing quality of Food Boxes For Sushi carton products

The ink absorption of base paper is a physical performance of paper and board, which refers to the ability of base paper to absorb ink. On the other hand, that is, the penetration of ink to the base paper. The penetration of ink to base paper needs to be achieved under specific technological conditions. Therefore, they need at least contact and pressure between this basic condition, this condition is the basis of ink penetration and ink absorption on paper. Obviously, the gloss of base paper is good, its ink absorption is poor, the drying speed of imprinting is slow, and prone to the occurrence of imprinting bottom and other undesirable situations. Ink-absorbing strong base paper, its surface fiber structure is bound to be loose, poor gloss, printing ink color is easy to flower, and easy to make the printing plate printing rate decline.

We know that when the ink is transferred from the plate or blanket surface to the paper, some of the ink, especially the ink in the binder will penetrate the base paper fiber tissue. At the same time, the solvent in the binder began to evaporate. In addition, the main part of the bonding material produces chemical reactions and physical reactions, so that the ink film on the surface of the printing gradually increases the viscosity and hardness, then the formation of a solid film, this is the ink transfer after the general drying process. This drying principle shows that the ink absorption capacity and absorption rate of base paper is essentially the penetration capacity and penetration rate of ink to base paper. It must reflect the speed of ink drying, and also affect the structure of the ink on the paper and the physical properties of the conjunctiva after the base paper ink absorption. It can be seen that the ink absorption of base paper directly affects the printing effect of the product.

If the ink absorption of the base paper is too strong, it will make the ink in the linking material is too much into the paper fiber, so that the oil in the ink layer is too much to reduce, so that the pigment particles are bound to be suspended in the paper, ink layer after the conjunctiva dry printing will lack gloss, and even some imprinting a little friction, the pigment will fall off, this is the imprinting powder phenomenon. If the base paper fiber tissue is too loose, ink absorption is too strong, ink pigment particles together with the bonding material will penetrate into the paper, affect the conjunctival thickness of the ink layer, so that the imprinting can not present the due color saturation on the paper, affecting the visual effect of the ink color. The ink absorption capacity of base paper also has a great impact on the drying speed of the printing ink layer. This is because when the base paper with too small ink absorption is used for printing, the ink layer is fixed and the drying conjunctiva is slow, which is easy to make the product stick dirty. Therefore, it is of practical significance to understand and master the relationship between base paper ink absorption and carton product printing quality for correct selection, good operation and technology, and avoid blindness in the process.