We can often see that the hero will use a silver needle to check whether the food is poisonous. If the food is poisonous, the silver needle will turn black. In fact, this is mainly because the ancients often use arsenic as poison, and arsenic will contain a certain amount of sulfur. This substance reacts with silver, which will make the silver needle black. In real life, some women wear silver bracelets for a long time, which will also cause the bracelets to turn black. Some people may think that this is a manifestation of body detoxification, and it has nothing to do with our body detoxification.
Because the air contains a lot of dust and harmful substances, such as nitric acid and various oxides, some of which will cause certain corrosion to silver jewelry, leading to the oxidation of silver jewelry and the generation of silver sulfide, which looks like black. At this time, many people may think, why wear silver bracelets, some bracelets will turn black when worn, while others will not turn black for a long time? The reason is closely related to people's physical quality. This is because their sweat contains a certain amount of sulfur. If some people like sweating very much, the silver bracelets they wear will turn black easily.
If sweat is very acidic, you will turn black. For people who don't like sweating very much, maybe the silver bracelet can stand still for a long time. In fact, in addition to sweating, people who smoke for a long time and like to use sulfur soap usually wear silver bracelets, which will also lead to silver blackening. In short, wearing silver bracelets for a long time is useless for detoxification. It turns black only because of the interaction of rivers. Of course, if the silver bracelet is black, it just needs cleaning. You can buy special detergent or go to a jewelry store to clean it.