Magnets can identify genuine and fake silver jewelry silver jewelry as cheap, stylish, popular with young women's favorite, however, that someone said that flooding in the assortment of silver jewelry to a large number of fake, shoddy, with this question CCTV Finance "is it true" for the field test. In the program site, 陈蓓蓓 invited a select audience at the bird imitation silver bracelet prepared four, the audience hesitated selected looks really real Yinzhuo, it seems generic Yinzhuo really real. Then Chen Beibei prepared 1 mm in diameter with a small magnet to touch the silver content of 99.0% fine silver tool in magnet manufacturers found either side of the stream tool with a pattern magnet manufacturers, or glossy inner magnet between the bracelet and have no appeal, how are sucked up. Then they try this silver content of 92.5% of silver bracelets with no attraction between the magnet, is not with the purity of silver has to do with it, the results showed the silver content of between 92.5% and silver bracelet with a small magnet there is no appeal, it is apparent, is not between pure silver with an attractive magnet. Then Chen Beibei continue the experiment, when touched with a small imitation silver ring magnets, small magnets and immediately got hooked on the ring. Through experiments, we can see that there is no tool between Changping magnet manufacturers, silver with small magnets attractive, but there is mutual attraction between imitation silver jewelry with magnets, this is because the main magnet adsorption Changan ferromagnetic substance Tools magnet manufacturers, such as iron, nickel, etc., and the main ingredient is silver imitation jewelry nickel and nickel-plated steel elements have the presence of nickel copper alloys, they can attract each other. The silver is not ferromagnetic material, so it can not happen with the mutual attraction between magnets. 1. Q: The magnetic energy NdFeB magnets can for how long? A: NdFeB magnets have demagnetization and will not change under a high magnetic coercivity, the natural environment and the general magnetic field. Assume appropriate environment, even after prolonged use, the magnet magnetic loss will not be great. So in practice, we often ignore the impact of time on the magnetic properties. 2. Q: magnet verticality, parallelism and roundness respectively? A: For example the outer diameter of the inner annular magnet D10-D30mm range verticality: 0.15mm Parallelism: 0.10mm roundness: 0.15mm outer diameter D30-D60mm verticality within the range: 0.20mm Parallelism: 0.15mm roundness : 0.20mm above is generally standard, any special requirements please specify in the order. Magnets stream tool manufacturers, tool manufacturers magnets can come Quotes from Dongguan City, Tong Xin magnetic Limited. Dongguan City, Tong Xin magnetic Limited (www.dgxtxmagnet.com/) strong, credible, magnetic materials in Dongguan, Guangdong and other industries has accumulated a large number of loyal customers. The company better work attitude and constantly improve the innovation concept will lead the new Xin Tong magnetic into the brilliant and you work for a better future!