Where photosensitive powder as color photosensitive products, color principle is to absorb certain wavelengths of ultraviolet light, the energy of the light source and the color change (into purple, red, blue, yellow, etc.) when the UV light of specific wavelengths in the absence of the original color. The photosensitive MC powder is a product which has been treated by the microcapsule technology, the appearance is powder, the particle size is between 1~10 m, and has the characteristics of high temperature, oxidation resistance, etc.. Photosensitive MC powder can be used in paint, ink, plastic industry, the design of the product mostly in the room (no UV environment) and outdoor (with ultraviolet light environment) has the color change for the appeal.