However, for impure silver jewelry, be wary that it contains metals such as nickel or chromium, which may cause irritation to the skin, especially to the baby with delicate skin.
According to the content of silver, it can be divided into:
1, 925 silver. Refers to silver containing 92.5% silver, which is recognized as the standard of pure silver in international standards. 100% silver is soft, so it can't be molded when making, which is not convenient for making silver ornaments, and it is easy to "oxidize", commonly known as "discoloration".
2. Pure silver. 925 silver plated with white rhodium (known as platinum in the industry) can delay the yellowing and blackening of silver under oxidation or vulcanization as much as possible. 925 silver without platinum plating is called "plain silver" in the industry, which is easy to oxidize in the air.
Extended data:
Pure silver application:
Pure silver has good ductility, and its electrical conductivity and thermal conductivity are the highest among all metals. Silver is often used to manufacture highly sensitive physical instruments and components, various automation devices, rockets, submarines, computers, nuclear devices and communication systems. A large number of contacts in all these devices are made of silver.
In the process of use, each contact has to work for millions of times, and it must be wear-resistant and reliable, and can withstand strict working requirements. Silver can meet all kinds of requirements. If rare earth elements are added to silver, the performance will be better. The contact life made of silver and rare earth elements can be extended several times.
People's Network-The brighter the silver bracelet, the healthier it is. Is it true?/You don't say.
Baidu encyclopedia-silver ornaments (ornaments)