Silver and sulfur will undergo oxidation reaction to produce silver sulfide. Silver sulfide is a gray-black unstable salt compound, which can be eliminated by toothpaste or medicine.
Whether the silver bracelet turns bright or black is not necessarily related to health. People's sweat and air contain sulfur, which may be oxidized and blackened by silver ornaments. But some people don't have sulfur in their sweat, but some skin secretions protect the silver ornaments and make them brighter as they wear them.
Extended data:
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.
Silver is a chemical element with the chemical symbol Ag. There is a small amount of silver in nature in the form of silver compounds.
Silver ions and silver compounds can inhibit some bacteria and viruses, but they are almost harmless to human body. It also has some applications in medicine.
Silver is not toxic to human health, but long-term exposure to silver metal and non-toxic silver compounds will also lead to silver deposition. Because the body pigment changes, the skin surface will appear gray-blue Although non-toxic, it will still affect the appearance.
People's Network-Why do some people turn black when wearing silver ornaments?