Perhaps in the eyes of ordinary people, compared to monochrome printing and color printing sample sample, simple process for many, ink requirements will be relatively low. But in practice, the printing staff has pointed out that the requirements of sample monochrome printing ink to offset ink is not low, affecting the quality of monochromatic modulation for the printing of large sample.

Due to the polar adsorption ink is stronger, it will promote the emulsification, ink viscosity will increase its cohesion, is the viscosity of the adhesion molecules strengthen ink. Therefore, in monochrome printing samples, to make the anti water ability strengthens, and the viscosity of ink must be adjusted in the printing process, in order to achieve the printability of fit, so that the influence of ink emulsification. Professional personnel will be in the deployment of ink, adding appropriate amount of control, general transfer ink not only weaken the ink, and the color of the ink to flow increased, viscosity reduction, weaken the intermolecular cohesion, affect the ink make water ability, will lead to the production of emulsion.

The pigment properties from the ink of different colors, different ink, the pigments of a qualitative distinction, the difference determines the value of emulsified. Such as: made of carbon ink pigment ink, the emulsion is small, not easy to emulsify, this is mainly good hydrophobic carbon ink sake. Lake pigment made of ink, due to physical pigments aluminum hydroxide, aluminum barium white pigment is hydrophilic, structure of the ink in the printing process is very easy to be destroyed, emulsifier pigment particles may play a role, resulting in ink emulsification.

As to the effect of auxiliary materials in monochrome sample printing. In printing ink will generally joined urge drying agent, sprinkle stick, scattered light agent and other auxiliary materials, ingredients for the drier is metal soap, and residual water soluble salts. It has strong moisture absorption, was also used as a strong agent. Add a certain amount of drying agent in the ink, can accelerate the drying of oil. But too much to add will have a negative impact, can lead to ink emulsification, but also to reduce the ink drying rate.