What is platinum1

What is platinum? Platinum (Pt) is a natural white precious metal. Only platinum can be called platinum. Not all white metals are platinum. The purity of platinum can usually reach 95% (the purity of 18K gold is only 75%). %). What is platinum? Platinum (abbreviated as pt) is a natural white precious metal. Only platinum can be called platinum, not all white metals are platinum. The purity of platinum can usually reach 95% (the purity of 18k gold is only 75%). Platinumu003dPlatinumu003dpt≠k Platinum The official explanation of the International Platinum Association: What is platinum, not all white metals are called platinum, please look for the pt sign when buying platinum! According to national regulations, only jewelry with a platinum content of 85% or more can be called platinum jewelry and must bear the pt mark. What is platinum? Platinum jewelry usually carries the purity mark of pt850, pt900, pt950, pt990 or pt999 (thousands of platinum). Therefore, there is no so-called 18k or 750 (75%) purity in platinum jewelry. This shows that in China, only platinum is called platinum. How to identify platinum: Color 　　Platinum is silvery white or off-white, which is between the colors of silver and nickel. Silver luster is white, easy to be oxidized with black spots or black; the texture is fine and smooth. Specific gravity 　　 Platinum has a high specific gravity, ranging from 15 to 19 or 21.4. The proportion of silver is 10.49. You can find the difference between platinum and silver jewelry of the same size by hand. Burning 　　Pure platinum does not change its color after heating or cooling by burning. After the silver is burned, its surface will show a moisturizing or black-red hue. Bending 　　Pure platinum is easy to bend and straighten back; the one with lower fineness is hard and brittle, and it is difficult to bend. Listening to the sound 　　, if you make a'toto' sound without rhyme, it is pure platinum; if you make a sharp sound of'ding-ding' with a sound and rhyme, it is platinum with a lower color. Mercury wiping test 　　 Utilizing the non-mercury-absorbing property of platinum, mercury is applied to the touchstone mill. If it absorbs mercury, it is k platinum prepared with gold, silver and platinum. In the nitric acid salt test, the platinum jewelry to be identified is ground on the touchstone, and a layer of salt is covered on the ground without covering it; then, drip nitric acid on the salt until it gets wet; then add some hot paper soot on the salt , Plays a catalytic role. After 20 minutes, rinse the salt and nitric acid with clean water. After doing it, look sideways. If there is no change, the color is about 99%; if there is a slight acid mark, the color is about 95%; if the trace of nitric acid is large, the color is about 80-90%; if the grinding track is corroded If the trace turns gray, the color is about 70%; if all the traces disappear, it is fake platinum. A woman like a flower_fr-2334 If you want to know more about what platinum is, please log on to the diamond website to get it, or contact customer service directly. Welcome to consult. Previous:Platinum Necklace Picture_Beautiful Platinum Necklace Picture Next:Chow Tai Fook Platinum Ring Style