Unsaturated resin and epoxy resin are widely used at present. Unsaturated polyester resin is a thermosetting resin, which can be cured into an insoluble polymer network under the action of heat or initiator. However, the mechanical strength of this polymer is too low to meet the requirements of most applications. After being reinforced with glass fiber, it can become a composite material, commonly known as "glass fiber reinforced plastic" (English FRP). The mechanical strength and other properties of "FRP" have been greatly improved compared with resin casting. Epoxy resin is a polymer compound system with epoxy groups in its molecular structure. The cured epoxy resin has good physical and chemical properties. It has excellent bonding strength, good dielectric properties, small solidification shrinkage, good dimensional stability, high hardness, good flexibility and stability to alkali and most solvents. Therefore, it is widely used in various departments of national defense and national economy, such as casting, dipping, laminating materials, adhesives, coatings and so on. Compared with unsaturated resin, epoxy resin has larger radian and brighter surface, but the price of epoxy resin is many times more expensive than unsaturated resin, which is unacceptable to ordinary customers. Longxiang Decoration has developed low-cost epoxy luminous characters to solve this problem, which makes the resin luminous characters have low cost and high-gloss mirror effect of epoxy resin. At the same time, Longxiang Decoration launched the patent luminous characters with multi-layer stereo color matching, which has a very high grade of effect and no equipment investment, leading the trend of luminous characters in the advertising industry.