Although many fast-fixing inks have been developed at present, it is intended to accelerate the initial solidification of the ink by means of physical changes in the ink and the paper itself to support piles of paper and slight drags. However, the problem has not been completely resolved. Especially in the fast speed, multi-color, high-grade paper printing. At present, anti-fouling agents are still in use and are developing. The first is the powdery anti-smearing agent, which is a mixture of six grain flours (maize starch), of which magnesium carbonate, calcium carbonate, atomized silica and wax powder are the most, and the compositional fineness is about 15 microns. , Not hygroscopic, neutral, smooth powder. After printing, it is sprayed on the printing surface. This layer is not touched, does not affect the pattern, does not affect the powder of printing time, and drags the printed sheet above. No sticking occurs. The printing machine is generally equipped with a powder spraying mechanism, and the powder is regularly sprayed on each printing product. Followed by aqueous emulsion and oily liquid or slurry. These materials are composed of liquid-solid two-phase materials, even immiscible materials that can be added to the ink or sprayed. With the selective absorption of the paper, the immiscible additives float on the surface of the ink, forming a "cushion" that serves as an anti-dirty effect. There are many such examples. For example, silica gel is dispersed in an alkyd resin in an amount of less than 3%, and the hydrophobic-hydrophilic balance can be handled, the color brightness can be increased, the ink system can be stable, and the drying can be rapid and the dirt can be prevented. Polyamide resin and paraffin 82: 18 melted and crushed up to 15 microns, used in the ink within 5%, can increase the gloss and prevent dirt. Starch can also be dispersed in turpentine (rosin) plus potassium tartrate, a trace of violet, used in the ink 0.5-3%, due to the role of starch from the cohesion, and play against dirt. There are also some surfactants, such as silicone oil added to the ink. Due to its light weight and non-miscible solubility, it can quickly fold off the surface of the ink film, increase the strength of the ink film to withstand pressure, and its smoothness, while reducing the ink The film lags behind in viscosity, preventing filthy dirt.