Which watchmaking brands have glow-in-the-dark watch patents

Originally used in watches, noctilucent materials were invented by Panerai. At this time panerai will also be the invention of the patent named their own watch series.
There are a lot of friends private message we said before the network spread the kind of watch luminous material, is it true that the radioactive statement, let us take this question together to discuss about the watch luminous material behind the story. Noctilucent material is the most comfortable application in the diving table, according to the needs of the Italian Royal Navy, developed a radium as the basis of the luminous material, and applied in its early stage diving table 3646, here, some friends may have found radium as a very radioactive element. The product of his decay was even classified by the World Health Organization as a class I carcinogen. And radium as the basis of the development of luminous paint, what harm to our human body?
In the early 19th century, after countless experiments, the Curies extracted 0.1 grams of radium salt from nearly a ton of slag and named the brand new element Radius. The discovery of sight radium caused a real revolution in science. The Curies won the Nobel Prize in physics. There are some basic chemical properties, such as very strong radioactivity, which releases a lot of heat when it decays, and metallic sulfides such as zinc sulfide and calcium sulfide, which emit light green light when exposed to radium rays. Because tired of special chemical properties, the application in production and life is also very extensive. One of its important functions is to mix with zinc sulfide to make a polishing coating. Since we know that radium is so highly radioactive, why do we persist in using it? To tell you the truth, this problem has plagued me before, but after further understanding, I know that although people have long been found the element of radioactivity, but people did not know that this kind of radioactivity is harmful to human body. So in the process of forming this kind of cognition, it is inevitable to experience a lot of madness and tragedy. When radium was just discovered, people marveled at its magical power, which was packaged as an extremely rare substance with miraculous effect in the society. Businesses try their best to hype, and even propagandize this radioactive substance, which can promote the sterilization of elderly care and even rejuvenate children, etc. The market is also full of health care products containing radioactive elements, such as radium containing drinking water, chocolate containing radium, and even this toothpaste and stomach medicine containing radium. You can imagine the difference between eating something like that and swallowing an atomic bomb. Of course, it was difficult to extract radium because of its limited productivity. So these products were very expensive, and only the upper class could afford them. Ordinary people can only be within reach.
As to the harmful effect of radium on human health, it was finally acknowledged by the public. Really can not leave the luminous material of the watch. At that time, the women workers who painted luminous materials on these hands in the watch factory were collectively called radium girls. They worked with radium every day and, like the general public, never thought the paint was harmful. They even put it on their hair and nails as a decoration. Some women were allowed to draw the dial in greater detail and to sip the nib of the pen in their mouths. It was a top job at the time, highly paid and requiring no physical labor, but nobody could do it for long. Anemia, toothache, ulcerated jaw, joint pain, broken bones, and even death are inevitable if you work for any length of time. At last the case of the radium girl was made public. And the public is increasingly aware of the dangers of radioactive elements. After recognizing the dangers, watch manufacturers dropped the paint and replaced it with a tritiated compound based luminous material. This material was also invented by Panerai and is called Luminor although the tritium-based material is also radioactive. But unless you inhale a lot of tritium, it’s harmless to us.
The application of tritiated compounds has been continuously improved, and finally a noctilucent method has been developed using miniature glass microcontroller. And this technology to apply to the high level, we must talk about the born in the United States emperor of the night light crazy demons: Bohr watch, using the night light technology, is 3H spontaneous light miniature gas lamp. This luminous gas is light and stable, producing no radiation and requiring no supplementary light source. Fluorescent materials with high power brightness are 100 times the standard in the US military. However, the service life of this material is only 25 years, and its brightness will gradually decline over time. No matter it is radium or tritium, the luminous material, it is self-luminous body with certain radioactivity. Now most of the table is the use of non – radioactive storage of light materials. In 1993, a Japanese chemical company developed a luminous material called Superluminova. This material lasts for a few minutes under light. It glows for hours, and its properties are so stable that it doesn’t fade or change easily even when used.
The material is now commonly used in diving watches of major brands. For example, omega’s Seahorse Universal Sea chronograph, even the panerai, the originator of night-light, USES this material.
Rolex is the only one that lets us do anything. In 2008, Rolex broke this monopoly by developing a new luminescent material called Chroma Light, which has a longer luminova time and a bluish color that is now the hallmark of rolex’s wet watches. He said so much, in conclusion, today’s luminous technology has been very mature, the safety of materials are not radioactive, will not cause any harm to our human body.