Nowadays, many people are getting better and better, and they have begun to pursue a higher level of material pursuit. Therefore, more and more people like to buy gold ornaments, in addition to gold ornaments that look gleaming, and because of gold ornaments. Can maintain value, may not continue to upgrade in the future, buy is to earn! However, there are many kinds of gold ornaments, such as pure gold, gold, gold, gold, etc. Different types of gold are different in color, different in purity and different in color, and more precious jewelry like pure gold and gold. There are often cases of fraud, how to identify the true and false of gold ornaments? The following small series provides you with the distinction between pure gold, gold, gold and gold-plated jewellery and a simple identification method. After reading it, you will not be fooled! Gold jewelry Pure gold is also called full gold. Pure gold jewelry is golden yellow, bright and soft, soft, hardness 2.5, density 19.32g / cm3, melting point 1064 degrees Celsius has good ductility, one gram of pure gold can be drawn into 2500 meters long filament. Hammered into 9.6 square meters of gold foil, which shows the good ductility of gold. As far as the current national standards are concerned, the purity of gold exceeding 990 can be called the full gold. Pure gold identification method (1) Imprint: All precious metal jewellery according to international regulations must be marked on the inside of the jewellery. The imprint is required to mark the imprint content and the manufacturer. Any gold content greater than 990 can be called full gold. (2) Quantity: The density of gold is 19.32g/cm3, which is more than twice the density of copper. The handcuffs have the feeling of falling hands and the handcuffs are heavy but not falling. (3) Listening to the sound: the golden jewelry will fall freely on the concrete floor, and its imitation will be a crisp sound. In addition, the pure gold jewelry has a small elasticity, and it will not bounce off the ground. As a result, most of its imitations will bounce several times due to the good elasticity. (4) Hardness: The hardness of the gold jewelry is 2.5 and the hardness of the human nail is equivalent, so the nail can be used to draw fine marks. Yellow series of K gold jewelry The yellow series of K gold jewelry is an alloy of gold and silver and copper. It can be made into K gold series jewelry with different K numbers according to the gold content. It mainly has 22K, 18K, 14K Asian people who like K gold jewelry with high K number, such as 22K and 18K. Europeans and Americans like 14K gold and 10K gold jewelry. The color of the yellow K gold series jewelry is related to the content of gold in gold and the ratio of silver and copper. The color of 18K gold jewelry is yellower than the gold jewelry of 14K, 10K, and the same gold jewelry of K number, if silver is better than copper Yellow is shallow, if copper is more yellow than silver, it is deep. Gold identification method The easiest way to identify K-gold jewelry is to look at the mark. Generally, European and American manufacturers are mostly on the back of K-gold jewelry, with the digital mark of gold content in K gold, such as 750, 585, 375 and factory records, while China and Hong Kong have more K-numbers, such as 22K, 18K, 14K and factory records. . In addition, the hardness of K gold jewelry is above 3.5, the surface is tough, smooth, and can not be scratched with copper needles. White series of K gold jewelry The gold jewelry of the white K gold series is white with a yellowish yellow color. The imprints are marked with WG imprint. The combination can be divided into the following two. The first alloy, which is mainly composed of gold and a combination of silver, nickel and zinc, is called K Platinum in the world. 18K K white gold is made up of 75% gold and 25% silver, nickel and zinc. 14K K Platinum is an alloy of 58.5% gold and 42.5% silver, nickel and zinc. The second type of alloys consisting of gold and nickel, combined with copper, nickel and zinc, is used internationally as the basis for the share of each metal in K Platinum. Currently there are only two varieties. That is, 334K white gold and 266K white gold 334K white gold is K white gold composed of 3 parts of gold, 3 parts of gold and 4 parts of copper, nickel and zinc. Some people also call it 60% white gold. 226K white gold is 2 parts of gold, 2 parts of gold and 6 parts of copper, nickel and zinc, which is also known as K-platinum. Some manufacturers in Hong Kong think that the price of 334K white gold and 18K gold, the price of 22K white gold and 14K are the same, and it is also called 18K gold or 14K gold, and it is marked with 18K gold and 14K gold. Platinum identification method In addition to looking at the imprint, K Platinum has a slightly greenish white color. The gloss is not as bright as platinum, some are black; the hardness is 3.5, there is no platinum (hardness is 4.3) hard; and the density is lower than platinum. Red series of K gold jewelry The red gold K-jewelry is mainly made of gold and copper, with a small amount of silver alloy, and the color is reddish. It is a favorite K gold jewelry of Europeans, and Russians especially prefer red 14K gold jewelry. In addition to the red color, the other methods are the same as the yellow series K gold jewelry. The inside of the jewelry is also marked with the gold mark and the factory record. Wrapped gold jewelry The composition of the metal in any part of pure gold jewelry and K gold jewelry is the same, while the gold jewelry in the package is two or more kinds of metal attached or forged together, wrapped in each other, and the metal composition is different in different parts. Its surface is gold, while the interior is copper and silver. Gold-plated jewelry Gold-plated jewellery is made of copper on the surface of the jewellery. It is plated with a layer of gold by electroplating, but the coating is generally very thin, around 3 to 5 weeks. This gold-plated jewellery is bright and soft, but not durable, just as easy to wear as a gold-plated strap, revealing a brass tire with a dim yellow color. Gold identification method (1) Carefully observe where there is no gold plating at the joints or corners of the jewellery; (2) In addition, its density is small, the hand rub is lighter, there is no falling hand feeling, and there is a crisp "duck" sound falling on the ground, and the elasticity will beat; (3) There is generally no mark, and sometimes the GP mark is printed. Gold jewelry Bao Jin is also known as gold in the United States. Gold-plated jewellery is a layer of gold foil on a copper or silver plate. The thickness of the gold foil is between 10 and 50 mm. Since the thickness of the gold-plated jewellery gold foil is thicker than gold plating, the appearance is similar to that of gold jewelry. This kind of gold-plated jewelry has the mark of KF in the United States. If the gold foil is ISK gold, it will be marked with 18KF on the inside of the jewelry. Sheet metal jewelry Sheet metal is an ancient gold-plating process. It is uniformly coated with a thick paste of gold and mercury on low-value jewellery such as copper and silver. It is then baked at low temperature. After the mercury is heated, it evaporates. Then attach the surface of the copper, then flatten and polish it. Currently, this method is rarely used. Because the surface of the wrapped gold jewelry has a very thin layer of gold, it is deceptive, but it still retains the characteristics of copper products with low density. SHAOXING OCEAN CO., LTD , https://www.sxgarments.com
