What is the best mirror surface for a watch besides a sapphire crystal

There are also mineral glass mirrors.

Sapphire Mirror Identification:

1) Laboratory method: detection is not sapphire glass, very similar to the identification of jewelry, the same instruments and equipment used, the most commonly used instrument for jewelry identification is the refractometer, which can determine the refractive index of the detected thing. Although the sapphire watch glass is artificial, its refractive index is the same as that of the natural one, because the sapphire glass is a crystal, so it has a heavy refractive index like a crystal.

The surface glass of the flat plate is best observed, the spherical surface is not very good-looking, and the refractive oil needs to be applied during the test. The refractive index of mineral glass is about the same size, and it is easy to distinguish it from sapphire, and it is not rerefracted. Another method is to use a polarizer, which can be used to detect all crystals, such as crystals.

Sapphire is also a crystal, and when the polarizer is rotated, the light changes alternately, with a cycle of 90 degrees. However, when inspecting the watch glass with a polarizer, you need to remove the entire movement to expose the watch glass. However, some non-sapphire watch glass may also have a polarized effect, because it is also made into crystals, such as those marked with the word crystal.

2) Look at the logo of the watch and the hardness of the glass: if it is a regular brand watch, the sapphire glass will generally be printed on the back cover of the watch, which is represented by English sapphire or sapphire crystal. To test the hardness of the watch glass, you can use a sharp metal object similar to a needle to scratch the edge of the watch glass at the most inappropriate eye, it feels very hard, there is a feeling of metal objects floating over, and the glass is not scratched, it should be sapphire glass.

The best thing about the watch is the sapphire crystal, which is as hard as a diamond and is very wear-resistant.

The anti-glare sapphire crystal is even better than the sapphire crystal.

Different kinds of mirrors have different advantages, and sapphire is more wear-resistant and has high hardness.

The Tissot T-Touch series is also available with a touch function.

At present, there are three main identification methods that are widely used: laboratory identification, drip method, and watch identification. In pawnshops, laboratory identification takes a long time and lacks the necessary conditions, and the latter two identification methods are widely used.

Sapphire density is relatively large, the surface is smoother and more delicate, if you drop a drop of water on the mirror, the water droplets will appear in the shape of a raised bead, while the water droplets on the mirror surface of other materials will be scattered, this is the legendary drip identification method. (When using this method, make sure that the waterproof performance of the watch is intact, otherwise it will easily cause water to enter the watch.) ）

crystal", etc., today's imitation watches are easy to do on the logo, at this time, you can also test the hardness of the watch mirror, with a small sharp metal scratch the mirror is more inconspicuous, judge the hardness by feeling, if the hardness is very high, it should be the sapphire mirror. (This method also has certain risks, and it is difficult to repair the scratching of the watch glass, so be cautious).

Both have their own advantages and advantages, which are manifested as:

1. Sapphire mirror: It belongs to corundum mineral, which is one of the hardest natural minerals on the earth. It is chemically composed of alumina and contains trace amounts of titanium and iron. It has the advantages of high hardness, strong wear resistance, and small scratch possibility.

2. Tempered glass: It belongs to safety glass, a kind of prestressed glass. Chemical or physical methods are used to create compressive stress on the surface of the glass. It has the advantages of filial piety, strong ability to withstand external forces, wind pressure resistance, cold and heat, and strong impact.