The mirror of a watch is constantly changing with the progress of science and technology. The mirrors used in early pocket watches (about a century ago) were all made of glass, but after the appearance of plastic material, it was convenient for mass production, low cost and relatively flexible, so it was a more suitable material than glass.
Of course, the most popular mirror in modern times is "sapphire crystal", which is actually a very strange name, but people who often contact watches are used to it. It is actually an artificial sapphire, made of alumina, which is much more expensive than ordinary glass. The reason is not the raw materials, but the process.
Early high-temperature firing like glass. A relatively new manufacturing method is to make it grow by growth, which is called "long crystal". After cutting and polishing, the sapphire crystal rod will become a mirror on the watch.
Matters needing attention in daily maintenance and use of watch mirrors:
1. Do not use watches (including waterproof watches) in hot baths, saunas or environments with large temperature changes.
Second, don't operate the buttons of the watch or adjust the crown in the water.
Third, please clean the watchband, case, etc. On a regular basis If it is a leather strap, avoid contact with moisture, moisture and cosmetics, and avoid exposure to the sun.
Fourth, please pay attention to the anti-magnetism of the watch and avoid being close to electrical appliances, mobile phones and magnets for a long time.
Please don't disassemble the watch under any circumstances.
6. Please avoid the watch being hit or dropped.
7. Please don't adjust the date of the watch between 22: 00 and 2: 00 to avoid damage and inaccurate calendar jumping.
Eight, if the watch is abnormal, you should immediately send it to a professional watch shop for inspection.