Platinum, also called platinum. Its English name is Platinum, and it is generally coded by the abbreviation PT. Wg is the abbreviation of English White Gold, namely platinum. The gold engraved with 14Kwg sold by merchants is 14K platinum, that is, the white alloy containing 25% palladium or nickel in gold is actually a kind of K gold, in which the mass fraction of gold is K number of "K Platinum" and the total mass is 24K. For example, the gold content of 18K platinum and 14 platinum is 75% and 58.3% respectively.
Platinum and gold are precious metals with high temperature resistance, acid resistance, corrosion resistance and strong thermal conductivity. Compared with gold, platinum has higher processing requirements, and platinum is rarer and more precious than gold, so the price is higher.
Platinum production is far less than gold. In addition, platinum has a high melting point, which is more difficult to extract than gold and consumes more energy, so its price is higher than that of Huang Jingui.
Platinum and K-gold platinum can be distinguished from the following points:
(1) Platinum is a natural pure white metal. K platinum is a mixture of gold and palladium, nickel, silver and zinc, so it is called K platinum. Adding palladium, nickel, silver, zinc and other metals will fade the yellow color of gold.
(2) Platinum is rare, and its annual output is far less than that of gold, which is more precious.
(3) The density is high, and a platinum jewelry is 20% heavier than similar K platinum jewelry.
(4) Platinum is resistant to corrosion and oxidation by strong acid and alkali, and its chemical properties are more stable than that of K platinum.
(5) Platinum jewelry is marked with "PT" and its color. For example, "PT990" means that jewelry is made of platinum with a platinum content of 99%. The mark of K gold and platinum, such as "18Kwg", is divided into main marks according to the gold it contains, that is, K gold and platinum with a content of 75%.
Platinum is a random name. The standard name should be: Platinum, K Platinum.
What is platinum?
Release date of www.xt-metal.com Xiangtai Metal Network: 2005- 10- 13.
What is platinum? Platinum (abbreviated as Pt) shone brilliantly in the history of human civilization as early as 700 BC. At that time, the ancient Egyptians decorated their boxes with beautiful hieroglyphics in platinum. By 100 BC, South American Indians had successfully mastered the processing technology of platinum and made platinum jewelry with different styles. /kloc-In the 8th century, King Louis XVI of France especially favored platinum, calling it "the only precious metal worthy of the title of king". In modern times, the world-famous jewelry design Cartierfabergetiffany has created an immortal masterpiece with platinum. The world-famous Hope diamond is always set in a platinum chain. At the beginning of this century, platinum has become the most popular precious metal in the United States. Its natural white luster has conquered the hearts of countless aristocratic families. After the outbreak of World War II, platinum has a very important military use. The US government once banned the non-military use of platinum and replaced it with platinum (an alloy of gold and other white metals), although platinum can never replace platinum in many aspects such as luster and hardness. Today, the application of platinum in jewelry continues. Its three characteristics of rarity, purity and hardness and its natural white luster still fascinate men and women who pursue fashion. Platinum is rare because the treatment of platinum is much lower than that of gold. So far, the global platinum reserves add up to only enough to fill a medium-sized room. It takes five months to extract one ounce of platinum from 10 ton platinum ore. Platinum is pure because platinum ornaments usually contain 90% pure platinum and 10% platinum. In contrast, 18K white gold only contains 75% pure gold, and the white luster of platinum is natural and will not fade after long-term wear. It is said that platinum is hard because of its high density and almost twice the strength of gold, and it is the best choice for inlaying all kinds of precision. Because of its good performance, one gram of platinum can pull out 2 kilometers long filaments. The hardness of platinum makes it hard to wear, and platinum lasts as long as new. The intrinsic value of platinum and its elegant luster have inspired countless jewelry designers, and the jewelry industry or fashion industry is keen to set off a "white wave" again. Cartier, a French designer, called platinum jewelry "the king of precious metals": GiorgioArmani used platinum wire in his evening dress; CalvinKlein also weaves his evening dress with platinum wire. The design of platinum jewelry is also constantly innovating, among which Japan, as the largest market of platinum jewelry, is particularly representative. Japanese platinum jewelry works fine, from casting to polishing, without exception. The design style is both fashionable and subtle. Every piece of jewelry is like a work of art. As the second largest platinum jewelry market in the world, China needs to further improve its design concept and processing technology to meet consumers' demand for personalized and fashionable jewelry. Therefore, the International Platinum Association will hold the first expert lecture on jewelry designers in Shanghai in early July, and invite Mr. Sekikazu, one of the top ten famous Japanese jewelry designers, to teach design concepts and skills to platinum jewelry designers in China. Generally speaking, simple lines, exquisite ideas and fine processing are the fashion of platinum jewelry design at present. So Thai platinum design is talked about by designers, because many modern works can be made by borrowing the silvery white and lines of the metal itself. The passage of time did not take away people's love for platinum, but increased its beauty. The charm of platinum lies in its peaceful aftertaste from the inside out. Its value, firmness, truthfulness, purity and elegance all make people feel that platinum is worth owning. ■ Seven characteristics of platinum 1. The alloy with the highest platinum purity contains 95% pure platinum, and 18K gold is 75% gold. The purity of a platinum jewelry is higher than that of gold jewelry. The rarest thing is that the world produces 140 tons of platinum every year, while the annual output of gold is 3300 tons. Only skilled craftsmen can make it. The melting point of platinum is higher than that of gold, so the technical requirements for workers are more skilled. 4. The most stable platinum is the metal with the strongest acid resistance, alkali resistance and high temperature resistance, and will not fade or change color. Platinum rings generally do not deform. 5. Platinum with good gloss and ductility has natural white and luster, which will not affect the color of gemstones and make them glow "fire". Good ductility also makes them suitable for processing. 6. Do not cause allergic reaction to the wearer. 7. Valuable and excellent. ■ The fineness of Platinum internationally, the symbol of platinum is the words Pt, Plat or Platinum, which are expressed by thousands of pure numbers. For example, the purity of Pt900 is 900% O, and the specifications of platinum ornaments are Pt 1000, Pt950, Pt900 and Pt850. Purity is expressed as the lowest value without negative tolerance. The table shows the purity range of platinum. The content of platinum in platinum alloy jewelry shall conform to the provisions in the table below, and the total content of platinum and palladium shall not be less than 950‰. ■ Types of Platinum Pure Platinum: Platinum with the highest purity. It is often used to make engagement rings to show the purity and eternity of love. In foreign countries, many people think that setting diamonds with gold may lead to the yellowing of diamonds, thus greatly reducing the price of diamonds. Diamonds inlaid with platinum can keep the pure white color of diamonds, especially as engagement rings. Diamonds inlaid with platinum are white and crystal clear, symbolizing eternal and long-lasting pure love. However, although the hardness of platinum is higher than that of gold, it is still not enough to set diamonds and jewels. It is often necessary to mix "gold" and make "platinum alloy" to set diamonds. Iridium-platinum alloy: An alloy of iridium and platinum. The color is also silvery white and has a strong metallic luster. High hardness. With high relative density and stable chemical properties, it is an excellent platinum alloy jewelry material. ■ The difference between platinum and K- platinum Platinum: Platinum is a precious metal, which is naturally white. The annual output of platinum is only one twentieth of that of gold, and it takes five months to extract one ounce of platinum from 10 ton platinum ore. Domestic platinum jewelry usually contains 90% pure platinum and is marked with "Pt900". White gold: Gold appears white after adding some alloys. It only contains 75% gold at most. White gold cannot be marked with Pt mark, only gold and its purity can be marked according to its purity. For example, 18K platinum can only be stamped with "18K" and "G750". In the international precious metal market, the price of platinum far exceeds that of gold, which is the highest among all precious metals. In addition, some white jewelry may be made of silver or coated with white metal, which may show its original appearance after a long time. Although platinum is sometimes commonly known as platinum, it should be called "platinum" in a strict sense. Platinum means platinum in English. Therefore, the purity, rarity, durability and natural white luster of platinum are incomparable to platinum. ■ The reserves of platinum in nature are less than that of gold. According to incomplete statistics, the global total platinum reserves are about 6.5438+0.4 million tons (the total platinum group mineral resources reserves are about 3.65438+0.0 million tons). Although more than 60 countries have discovered and mined platinum ore, their reserves are highly concentrated in South Africa and the former Soviet Union. Among them, the South African (azania) platinum reserves are about 6.5438+0.2 million tons, and Transtuva platinum mine is the most famous and largest platinum mine in the world. The reserves of platinum in the former Soviet Union were 1.866 tons. Natural platinum with a weight of 8-9 kg was found in the platinum mine of Ural placer, and natural platinum with a weight of 427.5 g was obtained in the primary mine. Their total reserves account for 98% of the world's total reserves. Every year, the annual output of platinum in the world is only 85 tons, far less than that of gold. In addition, platinum has a high melting point, so it is more difficult to purify and smelt than gold and consumes more energy, so its price is also higher than that of Huang Jingui.