Watch as a high timing instrument and art jewelry, the correct use and maintenance is very important, can extend the service life and degree of the watch and the appearance of the beautiful parts, so that it is more convenient for your work and life. The material of the mirror is divided into organic glass, mineral crystal glass, sapphire crystal glass and so on. Watchcase, watchband materials are common plastic, copper, stainless steel, tungsten titanium alloy, high-tech ceramics, precious metals and so on. Sapphire glass, tungsten titanium alloy and high-tech ceramics are not easy to wear materials, their hardness of Mohs level 9, 8, 7 (diamond is 10). Although these materials can resist wear, they cannot withstand impact, and some substances with the same or higher hardness, such as diamonds, corundum, metal oxide, quartz crystal, may damage these materials; Grinding stones, sandpaper, nail files, granite surfaces, glass and floors all contain the above substances, which will scratch the surface of these materials. The case and strap need to be cleaned frequently and can be washed and dried with warm water. Sweat, dirt, etc., corrode the appearance of the watch material, and can cause skin allergies in individuals. The newly bought watch should tear off the protective film on the back cover, otherwise sweat will remain in the middle and corrode the back cover. Watch to avoid contact with various chemicals, once encountered, to clean in time, so as not to cause coating discoloration, fall off or other losses. If you are buying a strap watch, please note: Avoid contact with water and moisture to prevent discoloration and deformation. Avoid prolonged exposure to the sun to prevent fading. Because the skin is easy to penetrate, avoid contact with oily substances or cosmetics.