< p > here the world is < a target= "_blank" href= "//m.pmae.cn/" > dress < /a > a target= "_blank" href= "_blank".

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< p > many customers who buy silver ornaments will find their silver ornaments black after some time and think they have bought fake products.

In fact, what is the reason why silver is darkened? Because everyone's endocrine and physical condition is different. Some people sweat more, some people are relatively few, and some people's body fluids contain relatively high sulfur content. These are the substances that cause silver surface darkening, so everyone wearing silver ornaments will produce different results. Some people will be bright as new in six months.

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Sulfur, nitric acid and oxides in air and other substances, such as eggs and cosmetics, have a certain corrosive effect on silver. < p >

Silver < a href= "//m.pmae.cn/news/index_f.asp" > jewellery < /a > long time. The combination of sulphur and silver will form a black silver sulfide film on the surface of silver jewelry. It begins to show some tiny spots, and then spreads into pieces, forming what people usually call silver scale, turning black into silver, and affecting the surface luster of silver jewelry. People usually mistakenly think it is fading.

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< p > however, it is also because of this natural characteristic of silver that silver has a good health function and is often worn to neutralize toxic substances in the body.

Silver ions have a strong bactericidal effect, can destroy 650 kinds of bacteria, can be used as a test tool, it is very good for the human body.

It can also accelerate wound healing, prevent infection, and purify water quality and preservative effect.

The ancients said: wearing silver, health and wealth will be accompanied by five zang organs, fixed mind, stop panic palpitation, in addition to evil.

In medicine, it is much higher than other precious metals in human health < a href= < //m.pmae.cn/news/index_f.asp > /a >.

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