How to choose platinum_how to choose platinum

Platinum is a naturally occurring white precious metal. It has the three characteristics of rarity, purity and eternity. It is also known as a love metal. Platinum is not allergic to wear. The dazzling array of platinum jewelry on the modern market is really dazzling, but , How to choose platinum. How to choose platinum Platinum is a naturally occurring white precious metal with the three characteristics of rare, pure and eternal. It is also known as the 'love metal'. Platinum is not allergic to wear. The dazzling array of platinum jewelry in the modern market is really dazzling. However, how to choose platinum? This has become a topic that people are paying attention to again. Because of its rarity, it has to make people more mindful. The following author will give everyone a suggestion. I hope to help you solve the problem of how to choose platinum and related issues. 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. Gas lamp spontaneous combustion appraisal 　　 Put the platinum jewelry to be appraised on the gas lamp socket. If it is true platinum, after a minute or two, the jewelry will turn red and the gas lamp will automatically ignite. If the jewelry is not platinum, there is no such reaction. Hydrogen peroxide reaction method 　　Platinum is a very good catalyst and has a unique catalytic effect. Using this feature, platinum can be quickly identified. Commonly used hydrogen peroxide reaction method. The specific method is: take a small amount of powder to be tested and place it in a plastic bottle containing hydrogen peroxide (h2o2). If it is platinum, the hydrogen peroxide will immediately roll and bubble, decompose a large amount of oxygen, and the platinum remains intact after the reaction. Recycling (it only accelerates decomposition); if it is pseudo platinum or other white metals, such as lead, silver, aluminum, etc., there will be no such reaction. Love at first sight_fr-5523 u200bu200bThe above is the information provided by the author on how to choose platinum. For more information, please pay attention to diamond net. Welcome to consult and purchase. Previous: How to choose a platinum ring_How to choose a platinum ring Next: Is white gold platinum?