UV ink is a kind of ink, which doesn’t have solvent, with fast curing speed, high gloss, and bright color. with the wide application of UV printer, UV ink is also widely used in many machines and has become a relatively mature ink technology owing to its own advantages . The UV ink can be divided into hard ink and soft ink based on the hardness properties of the printed material. On the one hand, the hard ink is rigid, not bending, not deformed. Some materials such as glass, ceramic tile, metal plate, acrylic, wood board, use hard ink. On the other hand, the Soft ink is elastic, flexible.