Oris uses only Super-LumiNova® luminous material. In the past, tritium luminous material was often used in diving watches. It was slightly radioactive but harmless in watches. The use of tritium by suppliers is now prohibited. Before tritium luminous material was used, radium luminous material was used, which has been banned since 1963 due to its radioactivity.
Super-LumiNova® is a non-radioactive pigment with a long luminous duration. This phosphorescent pigment works like a light battery. It absorbs energy from daylight and other light sources.
The afterglow of Super-LumiNova® is influenced by the following factors: the luminosity of the Super-LumiNova® color (white and yellowish colors have the best afterglow), the duration for which your watch was exposed to light, the intensity of the light (sunlight is more intense than artificial light), and the area or amount of luminous material applied.