How to distinguish between categories when buying gold products?

According to the composition of gold and other metal components, gold products can be divided into three categories: pure gold products, alloy (K gold) products and wrapped gold products. In reality, there is no 100% pure gold, and countries have different regulations on the lower limit of pure gold products. It is worth noting that according to the composition of gold and other metal components, gold products can be divided into three categories: pure gold products, alloy (K gold) products and wrapped gold products. In reality, there is no 100% pure gold, and countries have different regulations on the lower limit of pure gold products. It is worth noting that in my country,'pure gold' and'pure gold' are not exactly the same concept. The draft national standard stipulates that the lower limit of pure gold purity is 99.99%, and the lower limit of pure gold purity is 99.0%. There are three main types of pure gold jewelry on the market in my country: '49 goldSince pure gold has a low hardness and a single color, it is not strong enough to easily fall off when inlaid with gemstones. People add some other metals to pure gold and call it a gold alloy. Depending on the proportion of other metals added, the color, hue, hardness, ductility and melting point of karat gold are different. Countries in the world have different requirements for the content of gold in karat gold. Asians like high karat gold. Jewelry, such as 22k and 18k, Europeans and Americans like 14k and 10k gold jewelry. Generally speaking, as jewelry gold, the minimum cannot be less than 8k. Wrapped gold is an alloy with a layer of gold attached to the substrate of other metals. It is generally used for aesthetics and anti-corrosion. The main forms of wrapped gold are gold-plated, gold-clad, gilt and gold-plated. Gold plating is to plate a layer of gold on the surface of an article with copper as the embryo. The plating layer is generally very thin. Gold coating is to wrap a layer of gold foil on the surface of copper, silver, aluminum, zinc, lead or other alloy materials. It wraps the inner substance like wrapping paper and plays a decorative role. Because the thickness of the gold coating is thicker than that of the gold plating, the outer surface Very similar to gold jewelry. The quality of gold-clad jewelry depends on the success or failure of the gold-clad craftsmanship. The United States generally puts a kf mark on gold-clad jewelry. Gilding and gilding are both traditional and ancient decorative crafts. At present, my country's national standards have provisions for gold-clad and gold-plated products, as well as for gold product imprints and identification plates. Generally, the manufacturer's code, material name, and content imprint are required. Products without imprints are unqualified. Previous: Identify the authenticity of gold jewelry Next: Gold investment tips: Gold jewelry