Pure silver turns black after burning, which can be wiped off with toothpaste and silver cloth, because silver is easy to oxidize in the air, and combustion can produce some silver oxide. In addition, when it is burned black, it will remain on the surface of the silverware. These remain on the surface of silverware and can be removed by wiping. Pure silver is metallic silver, and its content is close to 100%. However, because silver is an active metal, it is easy to react with sulfur in the air, and the formation of silver sulfide will also make it black.

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Precautions:

1, wipe the silver cloth. It is the safest and simplest method to directly wipe off the black silver oxide on the sterling silver necklace with a silver cloth.

2. Rub the silver cream. If the necklace is badly oxidized, this layer of black silver oxide can also be wiped off with a small jewelry brush.

Step 3 use toothpaste. This is a small folk prescription, that is, take a small amount of toothpaste with a toothbrush, gently brush it on the surface of the necklace, and then wash it with water.

Step 4 use soda water. Soak the necklace in soda water for a while, then pick it up, wash it with clear water, and then use cotton cloth to absorb excess water.

Baidu encyclopedia-sterling silver