High initial brightness and long afterglow photoluminescent pigments

Long-afterglow fluorescent pigments is made by firing mixture of alumina and rare earth raw material.Afterglow can be maintained for more than 12 hours.It is non-toxic non-radioactive.photoluminescent pigments can be easily mixture with all kinds of chemicals with good durability and stability.The luminescence and shining process can be repeated for unlimited times.It has the features of high initial brightness and long afterglow and will provide convenience and security to all industries.