glow in the dark pebbles and technology

In addition , with tritium (3H or T) similar fluorescence excitation radioactive agents there promethium (Pm), the half-life of 17.7 years . Since the 1990s, with the development and progress of science and technology , the emergence of new storage afterglow light rare glow pigment powders  alkaline earth aluminate phosphor material does not contain radioactive material. It differs from the traditional nature of the sulfide -and radiation- excited type luminous material , completely free of any harmful elements , chemically more stable, high brightness, long afterglow time . Long-lasting storage realglow photoluminescent paint suppliers is a light-induced luminescence (Photoluminescence) material by ambient light , such as any kind of daylight , lighting and other energy excitation .