Under the action of light, heat and other physical or chemical factors, can change color reversible dyes called color-changing dyes, used in textile color-changing dyes (mainly thermochromic dyes, photochromic dyes and hygrochromic dyes and electrochromic materials); However, the friction fastness and color fastness to washing of these dyes are not ideal.In the late 1990s, people will introduce microcapsule technology into the preparation of color-changing dyes and made of color-changing microcapsule materials, that is, color-changing materials coated in microcapsules, microcapsules are color-changing substances inside, the outside is not soluble and can not melt transparent substances, thus protecting the color-changing substances from chemical erosion, At the same time, improve the resistance and solvent resistance of color-changing materials to the external environment, but also improve the affinity of color-changing materials to fibers, and better adapt to the requirements of textile finishing processing and use, so that the application of color-changing dyes in textiles to obtain a qualitative leap and performance improvement.Textiles (fibers, yarns and fabrics or garments, etc.) are processed with color-changing microcapsules using textile dyeing, printing/coating and finishing processes to give them color-changing properties. Color-changing microcapsules are used for dyeing and finishing of textile fabrics/yarns. The operation is simple and stable, and can be used for coating printing, coating finishing, dipping and dipping process, etc., with wide applicability. It is also suitable for plastic resin, ink and ceramic industry.Compared with the color-changing microcapsule printing and dyeing technology, the microcapsule color-changing fiber technology has obvious advantages: the color-changing fabric made has good hand feel, good washing resistance, and long-lasting color-changing effect.