1, the size of the pigment particles and its degree of dispersion

Although the role of the ink film capillary is an important factor in the gloss of the printed matter, the apparent size of the pigment particles in the dispersed state is more important, and it directly determines the condition of the ink film capillary.

Therefore, the pigment particles are small and the sputum is outstanding, which is advantageous for forming a smooth ink film, and is also very advantageous for improving the gloss of the printed paper.

2. The viscosity of the bonding material and the content of the pigment

According to the interface chemistry principle, the capillary soaking speed is inversely related to the viscosity of the liquid, that is, the soaking speed decreases with the addition of viscosity. The capillary network structure formed between the ink pigment particles is an important aspect of the resolution of the print gloss. At the moment of imprinting, the ink is pressed into the larger pores of the glass as a whole; after imprinting, the beginning of the binder is separated from the ink and enters the smaller pores of the glass. Therefore, the size of the ink film capillary determines the separation of the binder. Capillary retention of the binder is much more effective than printing pressure to press the binder into the pores of the glass.

3, boring time

The rapid drying of the ink film on the glass surface can reduce the amount of the binder entering the glass pores, and then improve the gloss and smoothness of the ink film. The high gloss of the ink film means that the specular reflection of the surface is relatively high, so that the human eye can see that the white light reflected from the outside is much less than the ink film with low gloss in most cases, so that the saturation of the color is more high. Therefore, prints with high gloss look more colorful and plump. The printing ink layer of the spot color ink is mostly translucent or opaque. When selecting the ink formula, the influence of the light transmittance of the ink layer on the spot color printing should be considered according to the actual situation.