Thousands of feet of silver usually have two signs; One symbol is "Thousand Foot Sound" with the same name, and the other is "S999". These two signs are both silver. It is easy to identify from the appearance, that is, the true color of bright silver. Because of the metallic characteristics of silver, 99.9% of silver is relatively soft, so it is not suitable for making imitation platinum or K gold inlaid jewelry. However, when it is used to make plain silver jewelry, it has the unique texture of silver jewelry. Due to the limitation of process difficulty,

Although the main body of Qianzu silver ornaments must reach 99.9%, the silver content of its accessories may be slightly lower, but it should not be lower than 92.5% according to national standards. The silver content of Qianzu silver used to make Qianzu silver jewelry shall not be less than 99.9%, which is also the highest purity standard of silver products stipulated in the current national standard "Provisions and Naming Methods of Precious Metals in Jewelry".

Extended data:

Pure silver is a beautiful silvery white metal with good ductility, and its electrical conductivity and thermal conductivity are the highest among all metals. Silver is often used to manufacture high-sensitivity physical instrument 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.

Baidu Encyclopedia -S999 Qianzuyin

Baidu Encyclopedia-Qianzuyin

Baidu encyclopedia-silver