With no emission of radioactive rays, the long afterglow luminescence can reflect light for more than 24 hours after absorbing sunlight, lamp and battery light.

Easily adaptable to change of temperature and humidity, it is useful in making handicrafts, fine art pieces, porcelains, guides, night illuminations, etc.

Kim Mun Song, a section chief of the Institute, told KCNA that the long afterglow luminescence, made with locally available raw materials, has higher and longer emission rate than the existing ones.