Traditional Culture Encyclopedia - Photography and portraiture - I bought a silver bracelet with details of Lao Fengxiang on Taobao. There is no mark s999. It's just marked with thousands of feet of silver. How did Lao Fengxiang know it was pure silver?
I bought a silver bracelet with details of Lao Fengxiang on Taobao. There is no mark s999. It's just marked with thousands of feet of silver. How did Lao Fengxiang know it was pure silver?
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 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.
Baidu Encyclopedia -S999 Qianzuyin
Baidu Encyclopedia-Qianzuyin
Baidu encyclopedia-silver
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