Crystal cards are highly personalized new RFID smart cards with the characteristics of crystal clear appearance, strong three-dimensional sense, and waterproof. The product is printed with a variety of materials, and is made of epoxy resin crystal glue on the surface. Epoxy crystal glue is composed of high-purity epoxy resin, curing agent and other modifications. The cured product has the characteristics of water resistance, chemical resistance and crystal clear. In addition to obtaining a good protective effect on the surface of the craft product, the use of the crystal glue can also increase the surface gloss and brightness, and further increase the surface decoration effect. Crystal cards are always used in membership management,consumption system, one-card payment, product identification, school management, community management, access control attendance, identification and other radio frequency identification fields.