First magnet who found the oldest record is a guide to Chinese Emperor Chi war car so called one of the three great inventions of China! China in the first century BC that is aware of the case of magnet polarization. Warring States era, had used a natural magnet, on a scale of copper coil for divination. The use of the Northern Song Dynasty two ways to create a human magnet, one is red-hot iron needle placed in north-south direction, after rapid cooling, the use of the Earth's magnetic field magnetized iron needle; the other is made of iron needles with magnet friction . "Dream Pool Essays" documented the presence of magnetic declination, found under the influence of the magnetic declination, needle pointing south, a bit more than the real south east. Based on this knowledge, and the development of scientific applications as a magnet compass. Magnet magnet is just a generic tool, generally refers to something magnetic actual ingredients are not necessarily contain iron. Relatively pure metallic state does not have a permanent magnetic iron, only close to the permanent magnet will produce a magnetic induction. General permanent magnet which added other impurity elements (such as carbon) to the magnetic stabilized, but it would be rather difficult to reduce the freedom of electronic conductivity, so when the current through the light bulb lit up. Magnets can identify genuine and fake silver jewelry silver jewelry as cheap, stylish, popular with young women's favorite tool for magnet manufacturers, wholesale, however, that someone said that flooding in the assortment of silver jewelry in a lot of fakes come shoddy, With this question, CCTV Financial "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. Next 陈蓓蓓 ready with a diameter of 1 mm of small magnets to touch the silver content of 99.0% fine silver tool in wholesale magnet found either side with a pattern, or between the inner glossy, magnets and bracelets We do not have any 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 tool magnet franchise stores, 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 magnetic attraction between the silver with a small, but there is mutual attraction between imitation silver jewelry with magnets, this is because the main magnet adsorption of ferromagnetic material, such as iron, nickel etc., but the main ingredient is silver imitation jewelery alloy of copper and nickel plated steel nickel-plated nickel element has a presence, so they can attract each other. The silver is not ferromagnetic material, so it can not happen with the mutual attraction between magnets. Tools magnet factory direct, tool magnet magnetic new Xin Tong provided by the 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!