DaLian Seder Luminous Products Co., Ltd. is a high-tech industrial enterprise specialized in manufacturing new type of long persistence photoluminescent pigment of alkaline earth aluminate activated by rare earth element. They have the advantages of short activating time, long afterglow, high brightness, various environmental adaptation, non-toxicity, harmlessness and non-radioactivity. With years research and development, the company is devoted to produce the related application products and other new functional material. Our goods reached international advanced level and have been exported to USA, European and Southeast Asia countries.