The introduction of 18KGP and 23KGP
Nowadays, there are more and more imitation 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 real ones, and therefore imitated accessories become the favor of beauty.
OK, let me introduce you to the meaning of 18KGP, 23KGP
18KGP, 23KGP is the symbol of the alloy. They consist of two logo compositions, 18K or 23K is one logo, K stands for value, that is, gold content, the formula is Au wt % = K / 24 x 100%, according to national regulation GB11887-89 , the gold content of each K value for 4.166%, so you can know that 18K contains 75% gold while 23K contains around 95%.
GP is the English abbreviation for Gold Plate. This type of logo refers to the materials of the metal are mainly phosphor copper, the product is made 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 which we mentioned before means gold content of the gold layer. Here maybe someone is concerned “why are 18KGP or 23KGP jewelry mostly white instead of yellow?” Actually, this is a confusion between pure gold and K gold. Generally, one of the characteristics of pure gold is that they are very soft, so when setting the gem in 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 type of alloy is called K gold.
Through this method, K gold can achieve nobility as pure gold, and it can also provide a pure gold gap, on the other hand, K gold can be made into various colors according to different needs. In international fashion jewelry, you can see different kinds of colors, but the most common color is yellow and white. K gold can be divided into colored gold alloy and white gold alloy by different colors. In the jewelry industry, Au-Ag-Cu (Zn) alloy is widely used, white gold is mainly Au-Ag-Ni (Cu, Zn) alloy and Au-Ag-PD ( Zn, Cu). When gold is mixed with 25% palladium, nickel or zinc, it turns white and its main component is still gold, this type of alloy is called K white gold.