The cause of gold fading

Many people find discoloration or fading after wearing gold jewelry for a period of time. Many people think that this is the lack of color of gold jewelry, go to the store to negotiate or consumer association complaints, but was told that there is no problem with the quality of the product. So, what is the reason for the accidental discoloration or fading of gold jewelry?

Wang Naizhu, secretary general of the Fujian Gemstone Association, told reporters that the discoloration or fading of gold jewelry is closely related to the sweat of the human body. 99% of human sweat is water, and about 1% is waste and harmful substances in the human body, such as chlorinated substances, lactic acid, urea ammonia and the like. When these materials come into contact with silver and copper in gold jewellery, they react chemically, producing silver chloride and copper sulphide, and appearing dark black smudges. On the skin where the jewelry is worn, it will give the color of the cosmetics containing chemical substances and the gold jewelry that is most afraid of chemical substances. Some cosmetics also contain some fine hard particles, which can form another type of dirt, thus wearing gold jewelry.

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