2, marking method: platinum jewelry has a standard imprint. Internationally expressed by PT or PT. For example, the purity of PT950 platinum is 95%.
Hand balance method: the density of platinum reaches 265,438+0.45. Through the balance test of the same volume of materials, platinum has a heavy feeling, which is heavier than gold (19.36), K- platinum and silver (10.45).
Melting method: the melting point of platinum reaches 1773oC, which is much higher than that of k platinum and silver. General welding guns can't melt platinum, so they can identify the authenticity. And the color of platinum remains unchanged after cooling.
Spot check method: first put mercury on platinum, platinum will not be polluted, and gold and silver will be polluted by combining with mercury; Then, use a file to coat some powder on the edge or the middle depression of the platinum jewelry and put it in a hydrogen peroxide bottle. Platinum can be used as a catalyst to promote the decomposition of hydrogen peroxide and release oxygen to churn up and down.
Natural gas method: put platinum jewelry on the twisted gas stove mouth for a few minutes. If the jewelry turns red and heats up to light the gas stove, it is platinum products. This is because platinum can be used as a catalyst to promote the oxidation and heat release of gas and air, make platinum warm and turn red, and thus ignite the gas.
The combination of platinum and platinum gives diamonds safe and lasting care.
The toughness and ductility of platinum means that even a small platinum claw can safely and firmly set every diamond. This can be proved in the classic designs of many international brands-platinum can be competent for all kinds of inlay designs and techniques, and firmly inlay every diamond of different sizes.
Platinum perfectly sets off the brilliance of diamonds.
The pure white color of platinum will not detract from the brilliance of the gem, but can truly show the fire color of the gem itself, whether it is shiny diamonds or other colorful treasures.
Platinum is the first choice for top jewelry brands.
The outstanding toughness and ductility of platinum enable it to carve exquisite lines. Top jewelry brands are familiar with these characteristics of platinum, thus creating countless amazing crafts, especially the customized jewelry of European royal families. Platinum and diamonds have always been masterpieces. They are perfectly presented and become the favorite of famous jewelry brands and the royal family.
The first maintenance method of platinum: avoid placing the diamond ring in an environment that is too cold or too hot.
Metal expands when heated and contracts when cooled, so diamond rings are affected by temperature. Putting the diamond ring in an over-cooled or over-heated environment will affect the firmness of the diamond inlay, and may even make the diamond loose and fall off, causing unnecessary losses. Therefore, don't put the diamond ring in a place that is too cold and overheated, and try to avoid going in and out of places with large temperature difference between hot and cold, such as cold storage and bathroom.
Second: avoid collision or friction between diamond ring and hard objects such as metal.
Although diamonds are hard, they may also have cracks. 18K precious metals such as gold and platinum will also be scratched due to friction, or extruded and deformed, resulting in an unsightly diamond ring. Therefore, when wearing a platinum diamond ring, it is not advisable to do strenuous physical strength or exercise. This can not only wear elegant taste, but also protect the diamond ring from being damaged.
To care for diamonds, we must also do two noes:
When doing housework, don't let the diamond ornaments you wear be stained with bleach. Bleach will not damage the diamond ring, but it will make the metal inlay fade or produce spots.
Don't pile diamond ring ornaments together in drawers or jewelry boxes, because diamond rings will "kill each other" when they rub against each other.
Third: When wearing a platinum diamond ring, try to avoid contact with chemicals.
The primary color of 18K gold is golden yellow, while the white 18K gold we see is the color after electroplating. If articles containing chemical components (such as skin care products, hand sanitizer, vinegar, etc. ) frequent contact, the electroplating layer is easy to be corroded, exposing the primary color of 18K gold. Therefore, please take off the diamond ring when removing makeup, and don't wear it for cooking, washing clothes or doing chemical experiments. Before doing these things, put the diamond ring gently in the jewelry box specially prepared for the diamond ring.