Nowadays, there are more and more imitated accessories on the market, and the imitations are more and more exquisite. Some items are even difficult to identify, what’s more, the price is much cheaper than the real ones, so the imitated accessories become the favor of beauty.
Well let me introduce the meaning of 18KGP, 23KGP
18KGP, 23KGP is the symbol of the alloy. They consist of two logo compositions, 18K or 23K is a logo, K represents the value, that is, the gold content, the formula is Au wt% = K / 24 x 100%, according to the national regulation GB11887-89 , the gold content of each K value to 4.166%, so you can know that 18K contains 75% gold while 23K contains about 95%.
GP is short for Gold Plate. This type of logo refers to the metal materials being mainly phosphor copper, the product is manufactured under high temperature forging and then covered with a gold-plated layer. According to different requirements, the thickness can be 1 mic or 3 mic, so 18K or 23K we mentioned before means gold content of the gold-plated layer. Here maybe someone is concerned that “why is 18KGP or 23KGP jewelry mainly white instead of yellow?” Actually, this is a confusion between pure gold and gold K. Generally, one of the characteristics of pure gold is that they are very soft, so when placing the gem in the pure gold accessories, it will fall off easily. Therefore, people will add silver, copper, zinc and other metals to pure gold while making jewelry, the purpose is to increase its strength and hardness, this kind of alloy is called gold K.
Through this method, K gold can reach nobility like pure gold, and it can also supply pure gold space, on the other hand, K gold can be converted to various colors according to different needs. In international fashion jewelry, you can see different types of colors, but the most common color is yellow and white. K gold can be divided into color gold alloy and white gold alloy by different colors. In the jewelry industry, what is widely used is Au-Ag-Cu (Zn) alloy, white gold is mainly Au-Ag-Ni (Cu, Zn) alloy, and Au-Ag-PD ( Zn, Cu). When gold mixes 25% palladium, nickel or zinc, it turns white and its main component is still gold, this type of alloy is called white gold K.