Solvent is an important part of gravure ink and flexible relief printing ink, and is also an indispensable material in plastic film composite adhesives. Solvents have the properties of dissolved substances and their own performance, and the volatilization rate is the important factor that determines the drying conditions of the volatile ink on the ink layer and the printing quality. So, what function does ink solvent have?

Ink solvent function:

1. have's ability to dissolve resin, making ink uniform liquid, liquid, can disperse dye, helps to transfer in the printing ink to the printed materials, at the same time help to improve the adhesion of printing ink.

2. The color is moistened and dispersed, and the stability of the ink is good, and there is no adverse effect on color change, coloring power, printing, color distribution, precipitation, condensation, etc. At the same time, can improve the ink to be printed material infiltration.

3. the adjustment ability of viscosity, organic solvent is a low viscosity liquid, added to the ink inside, can reduce the viscosity of it, therefore, to join the press can be adjusted according to the printing speed and the depth of the version of the best viscosity values, in order to achieve the best effect.

4. solvency or penetration of printed material, such as polyvinyl chloride (PVC) this kind of material can dissolve in organic solvents, due to its surface printing ink solvents to improve the dissolution of bond strength, printing good fastness. If it's an insoluble material. Such as ethylene, polypropylene, polyester, etc., due to the expansion of the solvent, its affinity with the solvent can increase the bonding force. Therefore, in the manufacture of ink, if the design of the solvent has no affinity for the material, then no good printing fastness.