2. Manual weighing method: Platinum has a high density, which can be distinguished by weighing materials with the same volume.
3. Melting method: The melting point of platinum is very high, much higher than other white metals. Generally, the welding gun cannot melt platinum, and the color of platinum remains unchanged after cooling.
4. Marking method: Platinum jewelry has a standard mark, which is usually expressed by the word PT internationally.
5, gas spontaneous combustion method: platinum can be used as a catalyst to promote the combination of gas and oxygen in the air to release heat, so that platinum will turn red and ignite the gas. So put jewelry 6. On the twisted gas burner, and if the jewelry turns red and hot after lighting the gas burner for a few minutes, it is platinum.
7. Spot test method: Mercury will not react chemically when coated on platinum, and platinum will not be polluted.
Extended data
Platinum common sense
Not all white metals are platinum.
Common white precious metals are platinum and platinum. At first glance, it looks very similar, but in fact it is two completely different materials. Platinum is a natural white precious metal, pure, rare and eternal. The main component of white gold is 75% gold. Due to the addition of other metals, the surface is white. So platinum is actually an alloy.
2. When buying platinum jewelry, please be sure to identify the unique symbol of platinum: Pt or platinum. According to national regulations, the back of each platinum jewelry must be engraved with the exclusive symbol of platinum: Pt or platinum.
Another unique feature of platinum is that it doesn't need special maintenance.
Daily care is simple. Usually, once or twice wiping platinum with a soft cloth can restore its luster.
China Anti-Infringement and Counterfeiting Network-How to Identify Platinum?
People's Network-How to buy platinum? Buy platinum and look for PT logo.