There are several types of watch glass, case and strap material

Table mirror can be divided into basic plastic materials, quartz glass mirror, sapphire mirror and other three categories. Relatively not afraid of falling plastic lens, but easy to wear, the most wear-resistant sapphire crystal. Case, strap material common plastic, copper, stainless steel, tungsten and titanium alloy, high-tech ceramics, gold and so on. Sapphire glass, tungsten and titanium alloys and high-tech ceramics are hard-wearing materials with hardness levels of 9, 8 and 7 (diamonds 10) respectively. Although these materials are not easily worn, they can not withstand the strong impact, while some of the same hardness or higher material, such as diamonds, corundum, metal oxide, quartz crystal may damage these materials. Millstone, sandpaper, Spring, summer, autumn and winter take a healthy way to see the four seasons health network Health diet health problems maternal and child health tips Nail frustration, granite surface, concrete walls and floors contain more than the above substances, will scratch the surface of these materials. Case, strap to be cleaned regularly, the watch should avoid contact with a variety of chemical products, once encountered, should be promptly cleaned, so as not to cause the coating discoloration, loss and so on.