What is Platinum, how is Platinum true and false? Only platinum can be called "platinum", but not all white metals are platinum. Please purchase the Platinum (Platinum) and look for the PT mark.
White gold has good reflectivity and is not easy to lose its luster. Before platinum and palladium are used in large quantities in the future, white gold is a silver-white metal mainly used for enamel gemstone jewelry.
1, see the color test
According to the color level, it is generally divided into three colors, the white-white and gray-grey color is higher in color; the white-white and yellow-yellow is the component containing gold or copper in platinum, and the color is second; the white-silver is the white gold component in white gold. Less than the above two. The fake is black.
2, fire test
Platinum is placed in a general fire and can only be burnt red and cannot be melted. After burning, the color of the color is above 95%, the color gloss is unchanged, and the more burning, the brighter, the color is slightly blacker at about 70%. The fake turns black and it melts easily.
3, 掂 test light weight and specific gravity test
Platinum has a specific gravity of 21.4, which is 10% heavier than gold. It is heavier than other metals. It is easy to pick it up by hand. It is combined with color to determine whether the light is not fake or the color is low. Further, the specific gravity test can be used, and the specific method is the same as the specific gravity test for identifying gold.
4, listening to the rhyme test
Pure platinum, after the fire burns, the sound of "toto", the sound is not rhyme, the color is not pure, it gives a "squeaky" sound, there is a voice.
5, see the product test
Use a pair of tweezers to cut the ornament horizontally in half, and then bend it to make a cotton (sticky) 茬. The higher the color, the softer the mouth, the fineness of the mouth is sand-like, and it feels crisp when cut.
6, bend to see soft and hard
Platinum, like gold, has good ductility and can be rolled into a platinum foil of only 0.0025 mm thick. 20 sheets of such thin platinum foil are stacked together, only as thick as a sheet of paper. Therefore, bending soft and hard can also be used as a test method.
7, nitric acid salt test
Grind the platinum on the touchstone, add a small amount of salt on the platinum road (cover half of the golden road), then add nitric acid to the salt, add 15 minutes to the salt to be eaten by nitric acid, and wash away the salt and nitric acid with water. . If it is platinum, more than 95% of the color, the Golden Road is unchanged, about 90%, the Golden Road slightly changes, slightly blurred by about 70% of the color, the Golden Road turns black gray, and is eroded by one layer.
8, mercury wipe test
The scientific name of mercury is called mercury, which is commonly known as mercury in China. The use of gold and silver to absorb mercury, platinum does not absorb the characteristics of mercury (at normal temperature), painted mercury on the Golden Road, if not absorbed, it means that it is true platinum, if it is absorbed, it is a fake product made of gold or silver.
9, gas lamp test
Platinum has the effect of a match and can be used to test the authenticity of platinum. The gas lamps are all lit by matches. If you put a real platinum in the gas lamp, after a minute or two, the white blond hair is red and the gas lamp is also lit. If platinum is fake, it will not turn red and the lights will not be able to.
10, hydrogen peroxide test
For example, platinum is powdery, put a little in hydrogen peroxide, it is real platinum, immediately white waves roll, decompose a lot of oxygen, platinum powder is not too much. If it is fake, it will not change.
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