Photoluminescent pigments (luminescent powder) is made mainly from the rare earth element and aluminate material. After absorbing the natural light or lamplight about 15 minutes, the powder can shed continual light with colour of yellow green , blue green or others for longtime. The powder is a non-radioactive, non-toxic and Green-Protection products. It can be used in many transparent or translucent media, such as plastic, paint, glaze, ink, glass and ceramic etc to produce luminous products.