Most of the gold plating on gold-plated watches is 14K gold, a gold that contains a certain amount of silver in addition to 58.5% pure gold. The reaction between silver and some volatile industrial waste gases in the air produces a black film of silver sulfide on the surface, which causes gold-plated watches to lose their gold-colored luster.
Therefore, it is important to avoid exposure to chemicals and exhaust gases such as gas, liquefied gas and sulfur soap when wearing a gold-plated watch, and to keep it dry and clean frequently. It is best to wipe it down with a flannel cloth once a week. In addition, the chloride in sweat is very corrosive to gold-plated watches, and gold-plated watches should be wiped clean in time when they are covered with sweat so that they do not lose their original luster due to perspiration.The yellow layer of a yellow-plated watch is a metal film composed of copper, zinc, and aluminum alloy, which can easily fade and lose its luster if not properly maintained. The watch case should be wiped clean with a clean soft cloth and evenly coated with a layer of colorless nail polish before wearing the yellow-plated watch, and then every one to two months afterwards. After such treatment, not only can the color of the yellow-plated watch be maintained and not worn out, but also increase its exterior brightness, and at the same time prevent sweat and moisture from invading the watch in the hot summer.
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