In printing ink, are often some organic compounds or polymer condensates. So today we'll look at some of the resins in the printing ink: 

Solubility and release of (1) resin. 

Solubility is the ability of the resin to be dissolved in a variety of solvents. In the manufacture of ink, the resin is generally used in the liquid, so the solid resin must have a certain solubility to be applied. Some are already liquid resin, but also because of the viscosity too much need to use solvent to reduce the viscosity of the solution can be applied. Solubility is an important property of the resin. 

Release is the ability of the solvent to be separated from the solvent. After printing ink, solvent separated from the resin, so that the resin gel and dry. The release property of the resin is related to the solubility, the solubility of the resin is good, which is not good for the solvent to be separated from the resin. Because of the resin is dissolved into liquid release solid, the transformation of form in the printing application. Therefore, the solubility of the resin with a proper degree, to ensure its solubility and release both achieve good balance. 

(2) the softening point of the resin. 

With the increase of temperature, the solid resin gradually softened, the plasticity increased, and finally changed to the liquid state. Softening point is that the resin softening process, specified as a viscous liquid by the change of temperature, the temperature of said flow temperature, softening point with the resin relative molecular mass increases. In general, the higher the softening point of the resin, the stronger the release of the solvent. In particular, the chemical composition of the same resin, this feature is more prominent. So the resin used in ink to soften the point is appropriate for the higher. 

(3) the viscosity of the resin. 

Viscosity is the viscosity of the solution in a given situation, or the viscosity of the solution. The viscosity of the resin was related to the molecular weight, solubility, the temperature of the solution, and the amount of solvent. 

(4) resin acid. 

Many of the resins used in inks are made from resin acids, fatty acids, aromatic acids, and other compounds. So how much have the resin did not participate in the reaction of the carboxyl group, the resin has a certain value. 

(5) the color and transparency of the resin. 

The color of the resin is caused by a variety of pigment impurities in the resin, which is related to the nature, the purity and the synthesis process of the resin material. Resins are generally light yellow. Transparency and resin in the mix of water and other impurities. Transparency affects the solubility of the resin, low transparency of the resin solubility.