According to incomplete statistics, about half of the world's printed fabrics are printed using a paint printing process. Especially in the United States, due to the production of a large number of polyester-cotton blended fabrics, paint printing accounts for up to 80%, while Western Europe accounts for 60%. 65%, Africa is about 50% in the Middle East, Japan is about 25%, and China is also about 20% to 25%. 1 Composition of paint printing paste Coatings, binders, thickeners and other additives such as crosslinkers, catalysts, emulsifiers, feel modifiers, etc. 2 Paint printing process and characteristics 1 Compared with other dye printing, paint printing is simple in process and easy to prepare color paste. If it is full paint printing, it can be sent to the whole assembly workshop by steaming or baking. The process is short, the labor productivity is improved, and the wastewater discharge is reduced. , environmental pollution is small. 2 It has complete chromatogram, good washing resistance, light resistance, good chlorine fastness, bright color, clear print outline, no selectivity to fiber, paint printing can be applied to all kinds of fabrics, especially for blended fabric printing. , it is evenly colored and does not produce flashing colors. 3 It can be printed with other dyes, or it can be used as a coloring dye in anti-dye printing. It has wide process adaptability and easy color matching. Because there is no dyeing rate problem and competitive dyeing phenomenon, the reproducibility of color light is good. 4 Can be used for special printing. Such as white paint printing, gold, silver powder printing, fluorescent printing, luminous printing, etc., the printed products have a three-dimensional sense, adding a variety of colors. 5 After the paint printing, the product has poor brushing and rubbing fastness, and the printing has a bad hand feeling, especially the large-area printed fabric has poor hand feeling. 6 Because the quality of the adhesive is not stable enough, sometimes the film is prematurely formed during the printing process, causing defects such as the intarsia tube and the sticking edge. 7 The monomers used to prepare the adhesive are mostly toxic. If the monomer in the adhesive is not removed, it has an impact on human health. The color of the paint is less vivid than the dye of the structure. For example, the red color of the paint is not as good as that of the ice dye. The color of the copper phthalocyanine blue paint is not as bright as that of the copper phthalocyanine blue dye produced on the cloth.  8 color paste is easy to crust, if it is left over, it is difficult to reuse. When it is screen printed, it often causes blockage. If the emulsion paste is used, it will easily pollute the air because it will volatilize during printing drying. In summary, with the development of synthetic fibers and various forms of blended fabrics and the development of coatings, paint printing has increasingly shown its superiority. The improvement of the performance of the adhesive, the appearance of the synthetic paste, and the application of the feel modifier make the paint printing have a broader development prospect. The structure and properties of the coating The coating is a homogeneous dispersion system made of organic or inorganic pigments and a certain proportion of glycerin, flat plus O, emulsifier and water. The solid content of the slurry is generally about 14% to 40%, and the fineness is mostly between 0.5 and 2 μm. If the particles are too small, the vividness of the coating is lowered, and the inorganic pigment and the metal powder are excessively ground. It is tarnished, the particles are too large, the color is darkened, the coloring rate is lowered, the brushing resistance is poor, and the coating which has been ground to a certain degree of fineness has a tendency to agglomerate during storage, so it is generally necessary to add a protective colloid such as an emulsifier to the coating. Or cyclohexanone and the like. The pigment used as a coating should have high stability against light, heat and climate. It should have good sublimation fastness and smoke fading to acid, alkali, oxidant and common chemicals. Relative density and dispersibility, relative density is too large or too small or poorly dispersed, it is easy to cause the coating to float or sink in the color paste; to have higher color yield and hiding ability, to use a small amount of paint A thicker color is printed, and the pattern printed on the deep color does not cause a color mixing effect with the ground color. Coatings are usually classified according to their chemical characteristics, that is, chemical classification, which can be divided into inorganic pigments and metal powders, organic pigments and fluorescent coatings. Inorganic pigments are white titanium dioxide, black is carbon black, such as coating black FBRN; metal powder is mostly copper-zinc alloy powder and aluminum powder with a certain degree of fineness. The organic pigment is an azo dye, a metal complex dye, a phthalocyanine dye, a vat dye, etc. which do not have a water-soluble group in a molecular structure, and generally, a deep red, blue, sauce, and yellow paint is an azo dye, and a brilliant blue The brilliant green paint is phthalocyanine dye, the golden and blue lotus paint is vat dye; the fluorescent paint is a special variety in organic paint, and the fluorescence occurs mainly because the dye molecule contains a fluorescent generating group and is composed of a conjugated system. Throughout, they absorb light of shorter wavelengths in visible light, thereby reflecting longer wavelengths of light, which absorb the energy of the incident light, converting some of the energy into light energy, thereby increasing the amount of reflected light. The intensity and intensity are significantly increased, that is, fluorescence is generated. 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