Silver ornaments turn black because silver reacts with sulfur in the air to produce black silver sulfide. Therefore, silver jewelry should not be in contact with perfume, powder, balsam, sulfur soap, sweat and acid. In order to restore the luster of silver jewelry, the following methods can be adopted: (1) Wipe with cotton dipped in white vinegar, black silver sulfide will dissolve in ester acid, and the silver jewelry will regain its luster. (2) Wipe with alcohol or sodium carbonate, and the effect is also very good. (3) Wash the surface of ornaments with detergent, then with sodium thiosulfate solution (prepared by adding 20g sodium thiosulfate into 100g water), and then with clean water. (4) mixing l parts of tartaric acid, 1 part of alum and 10 part of salt, heating to boiling, and soaking jewelry; /kloc-take it out after 0/0 minutes, wash it with clear water and dry it. (5) Washing the mirror with ammonia water or squeezing toothpaste on the flannel can also restore the original luster.