Why do silver earrings turn black after wearing them for a few days?

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Why do silver earrings turn black after wearing them for a few days?

time：2022-04-25 source：sznbone Views：

I bought a pair of silver earrings for 10 yuan online, but they turned completely black after wearing them for a few days. Why?

When you buy things online, you will often buy fake and defective products, not to mention that the cost of silver is more than 1 gram, and the silver earrings you buy for more than 10 yuan are not genuine.

Silver earrings produced by silver jewelry factories are generally carefully polished and polished, and then electroplated with platinum (the electroplating fee is generally 3~5 yuan). The whole cost is calculated at least 20 yuan, plus the profit. . . Therefore, earrings of 10 pieces should not be real silver earrings, and electroplating is not normal rack plating, but low-cost barrel plating. Such earrings are not only easy to turn black, but also cause wearing allergies. It is recommended not to buy them.

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Why do silver earrings turn black after wearing them for a few days?