The light box is a viewing light box for perspective x-ray (negative). Lamp box is generally made of light sheet, preferably PC board, which can resist high temperature up to 145 ℃ and low temperature to - 55 ℃. Light box is widely used in life, and can be made as: ultra thin light box, Blister light box, road sign light box, bank light box, vision chart light box, mirror light box, induction light box. Light box has bright colors, eye-catching effect, strong sense of three-dimensional modeling; content performance effect is durable, high temperature, climate change; not easy to deformation