I believe everyone has heard of 18KGP and 23KGP when buying jewelry, but I don't know what they mean. In fact, they are composed of two kinds of signs. 18K or 23K is the symbol, and k represents the gold content, that is, the relationship between k number and gold content: Au wt% = K/24? 100%, the national standard GB 1 1887-89 stipulates that the gold content per k is 4. 166%, so it can be converted into 18K with gold content of 75% and 23K with gold content of about 95%.

So, what do 18KGP and 2 13KGP mean?

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Everyone has a love of beauty. Seeing more exquisite and gorgeous ornaments, everyone naturally has the impulse to own them. But limited by the budget and consumption level, not everyone has the ability to buy what they want. As a result, simulation ornaments came into being.

At present, there are not only a large number of imitation ornaments on the market, but also exquisite skills. Some can even be confused with the real thing, but the price is much cheaper than the real thing. Therefore, imitation jewelry began to be favored by many women who love beauty. When it comes to imitation ornaments, we have to mention 18KGP and 23KGP. So, what does 18KGP mean? What information is revealed behind these numbers and letters?

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18KGP and 23KGP are actually special symbols of alloy imitation jewelry, where k stands for gold content, that is, gold content in jewelry. National standard GB 1 1887? 89 clearly stipulates that the gold content per k is 4. 166%, so it is converted into 18K with about 75% gold and 23K with about 95% gold. After analyzing K, let's take a look at what GP is. GP is actually the abbreviation of English goldscape, commonly known as forging gold in business. Products with this mark are generally made of phosphorus and copper, forged at high temperature and plated with gold. According to the thickness of gold layer, it can be divided into gold plating and gold plating. The thickness of gold-plated layer is about 1 mi (mi is the unit of gold-plated layer thickness stipulated by international standards), and the gold-plated layer is about 3 mi.

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At this point, some people may have doubts. Since most of the imitation jewelry is gold-plated or covered with gold, why are the jewelry of 18KGP and 23KGP mostly white instead of yellow? This suspicion is actually a confusion between pure gold and k gold. One of the characteristics of pure gold is softness, and it is easy to fall off when inlaid with precious stones because of insufficient strength. People add silver, copper, zinc and other metals to gold to increase its strength and toughness. The gold ornaments made in this way are also called K gold. In jewelry inlaying, almost all gems are inlaid with K gold with different K numbers. This not only makes gold noble, but also makes up for its shortcomings, and can be made into various colors as needed.

So we can simply say that GP is a symbol of gold-plated or gold-plated jewelry, and the front 18K or 23K refers to the gold content of the gold-plated layer outside it. 18KGP refers to gold-plated or gold-plated jewelry with a gold-plated layer of 18K gold; 23KGP refers to gold-plated or gold-plated jewelry with a gold-plated layer of 23K gold.