Glow in dark film is made of rare earth element activation and alkaline earth aluminate, itâ??s a digital printing film. It is non-toxic, non-radioactive and stable in chemical properties. Glow in dark film� is made of rare earth element activation and alkaline earth aluminate, itâ??s a� digital printing film. It is non-toxic, non-radioactive and stable in chemical properties. Performance characteristics: The luminous condition of the� luminous film� is very low. When the ordinary fluorescent lamp is used as the light source, when the light intensity is 25LX, it can be used as the light source. The light intensity of a typical building can reach 500-600LX. Therefore, sunlight, general illumination, and indoor environment reflection can be used as excitation sources. Application: Fire safety sign, ship safety sign. General orientation, indication, identification. Years of use: indoors for twenty years, outdoor for seven years. DERFLEX is professional manufacturer and supplier in China focusing on all kinds of digital printing materials. If you have more interest, please contact us freely!