The characteristics of water-based ink pigments meet the different needs of consumers for printed products. As the water-based ink resin is mostly alkali-soluble, in the selection of pigments to be used when the alkali-resistant pigments. Water-based ink pigment distribution density is much larger than solvent-based water-based ink, and water surface tension and polarity are different with the solvent, water-based ink pigment dispersion difficult, directly to the stability of water-based ink, viscosity and pH.

Water-based ink with the addition of surfactants can increase the affinity of resin and water and pigment and water-soluble binder affinity to solve the problem of water-based ink stability. The viscosity and pH of the ink are in need of precise control. When the pH is higher than 9.5, the viscosity of the water-based ink decreases, the drying rate becomes slow and the water resistance is deteriorated. When the pH value is lower than 8, the basicity is too weak, the viscosity of the water-based ink is increased, the drying speed Speed up, there will be dirty version, paste version, blistering and other defects. Water-based ink in the printing of paint with color should be selected bright, low viscosity, stable system of advanced pigments.

The binder, pigment, and adjuvant are the substances that make up the water-based ink. The binder provides the necessary transfer properties of the water-based ink, and the pigment imparts color to the water-based ink. Water-based oil is divided into water dilution type, water dispersion type. The former can use a variety of resin types. The water-dispersible linker is obtained by emulsifying the monomer in water. The aqueous ink is a two-phase system in which the oil phase is dispersed in the aqueous phase in the form of granules, although it can not be dissolved in water but can be diluted with water, so it can also be considered an oil-in-water emulsion type.