The following methods are destructive, such as corrosion and polishing, so use them as appropriate.
1, professional silver washing and water washing.
2. Silver jewelry stores are polished by polishing machines (without the suggestion of platinum electroplating, the anti-oxidation layer will be gone after platinum electroplating).
Step 3 scrub with toothpaste and toothbrush
Extended data:
Why does silver turn black?
First, because everyone's endocrine and physical condition are different, some people's sweat contains more acid, some people have less, and some people's body fluids have high sulfur content. These are all substances that cause the surface of silver ornaments to turn black, so everyone will have different results when wearing silver ornaments, and some people will be as bright as new after wearing them for half a year.
Second, sulfur, nitric acid and oxides in air and other substances (such as eggs and cosmetics) have a certain corrosive effect on silver. Silver jewelry is worn for a long time, and the combination of sulfur and silver will form a black silver sulfide film on the surface of silver jewelry. At first, it will show some tiny spots, and then spread into pieces, forming what people usually call silver scales, turning black and affecting the surface luster of silver jewelry. People usually mistake it for fading.
It is precisely because of these natural characteristics of silver that silver has a good health care function, and it can neutralize toxic substances in the human body when worn frequently. Silver ion has a strong bactericidal effect, which can kill 650 kinds of germs, and can be used as a tool for poison detection, which is very beneficial to human body. It can also accelerate wound healing, prevent infection, purify water and keep fresh. As the ancients said, wearing silver is accompanied by health and wealth, and the five internal organs are safe, the mind is calm, and the shock is stopped and the evil spirits are eliminated. In medicine, it has a much greater effect on human health than other precious metals.
References:
Silver ornaments (decorations) _ Baidu Encyclopedia