Lead: After a hundred years of evolution, watch the luminous material has undergone enormous changes, to understand some of these small details you have not noticed it.
Rolex Rolex in the new DEEPSEA diving watch using innovative Chromalight luminous display, effectively enhance the clarity, blue luminous display time is two times the luminous materials in general.
The earliest luminous material is the use of zinc sulfide. Zinc sulfide itself does not emit light, but has a phosphorescent property, that is excited by sunlight or light irradiation, which lasts for a certain period of time. However, zinc sulphide decays very quickly, with no light in the dark for a while. This zinc sulfide is harmless to radiation. In 1898, Marie Curie discovered the radioactive element radium. At that time, people found that if the radium and zinc sulfide mixed, then zinc sulfide will emit its own light, no longer need sunlight or light can be excited. In this way, this "cross-age" luminous material began to rapidly spread. From the 1930s onwards, the luminaries used on clocks and lanterns are basically such materials. If you use radium as a luminous material, it must be harmful to the human body.
Panerai watch
Panerai high degree of recognition of the use of luminous materials have a number of patents on this section for the LUMINOR 1950 3 DAYS ACCIAIO
1949 Panerai patented Luminor luminous technology, which began to use tritium luminous material, but this is also a radioactive element. Although the luminous material as a hazard to the human body than radium, but when wearing a watch or will be subjected to extremely trace of radiation hazards. Remove the watch, there is no direct radiation. This is the reason why the root cause of "Night watch to be removed when sleeping at night" has been circulating. This tritium luminous from the last century 50's has been used until the 90's.
Now some brands, such as Bol also use tritium gas pipe. Tritium trachea is coated with a thin layer of zinc sulfide on the inner wall of the glass tube, and then filled with tritium gas in the tube. Tritium gas in the tube will stimulate the continuous light of zinc sulfide, which can last for 20 years. In addition, the greater the pressure of the tritium gas filled in the glass tube, the greater the light emission brightness. Of course, this technique is also radiation, but "put aside the dose to talk about the dangers are rogue." In fact, the radiation hazard of using tritium as an excitation element is very small, equivalent to none. The ray even sapphire crystal mirror are difficult to penetrate, even if the tritium trachea rupture, tritium leakage on the human body is also not worth mentioning.
IWC Ocean Timepiece Deep Two uses a high concentration of Super-LumiNova luminescent material
Although tritium luminous only trace radiation, but still can not be called completely safe. With the development of science and technology, modern watches began to use the new luminous material Super-LumiNova, which is a no radiation hazard, non-toxic luminous, composition of strontium aluminate and rare earth compounds. Japan's Nemoto & Co. Ltd. Is the patentee of Super-LumiNova Luminous, which was invented in 1993 and cooperates with Switzerland's RC TRITEC Ltd. A joint venture, LumiNova AG Switzerland, is established to provide this premium luminous material to the world. Super-LumiNova not only has no radiation hazards, non-toxic, and the luminous effect is very good. Super-LumiNova in the initial light-emitting, luminous intensity than tritium gas pipe, the intensity even higher than the traditional zinc sulfide 100 times.
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