This pigment is a new type of long after-glow photoluminescent pigment. Free from any radioactive substance and toxicity and with strong capability of absorbing-storing-emitting light, the pigment can glow in the dark automatically for several hours after absorbing varieties of visible lights for 10-30 minutes. Being on kind of additives, it can be added in many medium, such as coat, paint, ink, plastic, ceramics, glass etc. Those luminous products applied of this pigment show good effects in illumination,[...]