Silver turns black because it can react with sulfide to produce black silver sulfide. If there is sulfide-containing gas in the air, or silver ornaments come into contact with sulfide released by sweat, excrement and egg products for a long time, it will turn black after a period of time, giving people the illusion of "sucking" human wet poison, which is a normal natural phenomenon.

Precautions for wearing silver ornaments:

1. When wearing silver jewelry, don't wear other precious metal jewelry at the same time to avoid collision, deformation or wear.

2. Avoid contact with water vapor and chemicals, and avoid swimming in clothes, especially in the sea.

3. Wipe it clean with cotton cloth after wearing it every day, and put it in a jewelry box or bag for sealed preservation.

4, has been oxidized to black, you can use a soft brush dipped in toothpaste to scrub, you can also use hand sanitizer or detergent to clean. If it is really impossible to clean, brush it with silver washing water and dry it with cotton cloth after washing.