Fine craft and skilled operation is very important to paper bag printing, it deeply affects the quality of paper bag printing. It is also the key to the manufacturer to get the paper bag printing market, and we will share some skills of paper bag printing technology from three aspects of pigment, link and drying time.

1 the size and dispersion of pigment particles

Although the role of ink film capillary is an important factor in the formation of the printing luster, however, the apparent size of the pigment particles is more important, it directly determines the state of the capillary. Therefore, the pigment particles are small, dispersed well, is conducive to the formation of a smooth ink film, for improving the paper bag printing gloss is also very favorable.

2 the viscosity of the connecting material and the content of pigment

According to the principle of the interface chemistry, the capillary permeation rate is related to the liquid viscosity, that is, the permeation rate decreases with the increase of the viscosity. The capillary network structure formed by the ink pigment particles is an important aspect to determine the luster of the printed matter. In an instant, the ink is pressed into the larger pores of the paper; after the impression, the connecting material begins to separate from the ink, penetrate into the smaller pores of the paper. Therefore, the size of the capillary of the ink film determines the amount of separation of the connecting material. Capillary retention of the role of the connection material than the printing pressure to the connection material into the paper pores of the role of a large number of.

3 drying time

The rapid drying of the ink film on paper can reduce the amount of the connecting material penetrate into the pores of the paper, so as to improve the gloss and smoothness of the ink film. Ink film gloss high mean surface degree of specular reflection is relatively high, so that the human eye in most cases can see than low gloss surface reflection of light to the ink film is much less, the color saturation is higher. So the high gloss printed matter looks more vivid color, full. Spot color ink printing ink layer is mostly translucent or opaque, in the choice of ink formulation should according to the actual situation of considering the influence of spot color printing ink layer transparency.