How to make the noctilucent watch clearer and brighter at night (is there any difference in the night display ability of the noctilucent watch)

Fluorescent substances can only emit light if they are illuminated. You shine the dark parts in strong light for a while, and then compare them together. If it is difficult to meet the same conditions, you can light them together for half an hour, then put them in a dark environment for 3-4 hours, and then compare them-this will be more strict. Please refer to the following for the fluorescent substances of luminous watches.

Luminous watches, referred to as luminous watches, are coated with luminous powder on the dial block and hands, so that the time can be seen clearly at night or in the dark.

In the past, luminous powder was based on powdered zinc sulfide, which did not emit light itself, but only had phosphorescence characteristics, that is, it was excited after being irradiated by sunlight or light, and it would continue to emit light for a certain time, but the time was very short. In order to continuously excite zinc sulfide, a certain amount of radioactive elements must be mixed. Radioactive elements can not only stimulate the luminescence of luminescent materials, but also gradually destroy the structure of luminescent materials, making the performance of luminescent materials weaken or even disappear, so the luminous meter will not light up after a certain period of use. At the same time, the dangers brought by the radioactive properties of radioactive materials used in the early days are now replaced by tritium. Recently, it was replaced by a super luminescent coating, which does not oxidize and has no radioactive risk.

-Life is long.

1. Fluorescent materials, generally light storage materials, gain energy by receiving light, and slowly release it in the dark, usually lasting about 7 hours, and the luminous intensity gradually weakens. At present, most watches use this material in the form of paint, and most watches use this material, among which Japanese light storage material is better.

2. The tritium tube is filled with pure B radioactive source tritium, and the inner wall of the tube is coated with fluorescent material. However, this fluorescent material has no light storage function, but uses tritium B-ray to excite luminescence, and the B-ray cannot penetrate the tube wall, so long as the tube is not broken, it is harmless to people. This kind of luminous system is rare in the market, and its appearance is a thin glass tube stuck on the watch hand. At present, lumniox traser Poles and some foreign military watches are mainly used.

Radium-based coatings are rare now. In the past, Laos, Pepe, Europe and so on all used this luminous, which is a mixture of radium salt (later turned into tritium) and fluorescent powder, and applied to hands and nails. If you open the mirror, the human body can come into direct contact with radioactive elements. In addition, radium salt is easy to corrode the watch core, so it is no longer used, and most of it is replaced by light storage materials.