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What is 18K gold or 18K alloy

by:Joacii     2021-03-17
One of the characteristics of gold is its softness, so it is difficult to inlay various exquisite styles, especially when inlaid with treasures such as pearls, gems and jadeites, it is easy to be lost. Therefore, people add a small amount of silver, copper, zinc and other metals to gold to increase the strength and toughness of gold. One of the characteristics of gold is softness, so it is difficult to inlay various exquisite styles, especially when inlaid with pearls, gems and emeralds. Treasures are easy to be lost. Therefore, people add a small amount of silver, copper, zinc and other metals to gold to increase the strength and toughness of gold. The gold ornaments made in this way are called k gold. K gold can be prepared into various colors according to needs. The popular K gold jewelry in the world has various colors, and the common ones are yellow and white. If 25% of palladium or nickel is mixed into gold, it will become white, and the main component of it is gold, which is called platinum. As far as the current level of technology is concerned, it is still impossible to extract pure gold materials with a purity of 100%. Therefore, the gold level standard k indicating the content of pure gold in gold products generally refers to pure gold as 24k gold, but it is gold with 100% gold in theory, and does not actually exist. Therefore, in the national standard, merchants must not use the non-standard method of '24k gold' to indicate the gold content of gold jewelry. Since pure gold is called 24k, that is, the theoretical gold content is 100%, then 1k means that gold products contain 1/24 of pure gold, which is about 4.16%. 18k gold means that the gold content is 18/24, which is 75% pure gold, and the rest are other materials such as silver or copper. As the saying goes,'gold is not pure'. Generally, gold jewelry contains less than 1% of other metals. Regarding the fineness of the gold content of gold products, the national standards have very clear regulations, that is, each piece of gold jewelry sold by a business must be listed with its gold content and weight. The weight of gold jewelry shall use the national legal unit of measurement. The gold content should be'k gold' (excluding 24k gold),'full gold' (gold content not less than 99%),'thousand pure gold' (gold content not less than 99.9%), and'thousand pure gold','cannot be used' Non-standard methods such as pure gold and non-existent '24k gold' and '9999'. How to distinguish between true and false and quality when buying jewelry?   1. Look at the color: pure gold is dark yellow, karat gold has multiple colors such as yellow, red, and white, while imitation gold products are mostly copper alloys with lighter colors. 2. Handling weight: The proportion of gold is 19.3g/cm3, which is much higher than that of imitation gold products. For example, a solid gold ring is about 5 grams, while imitation gold products of the same size generally weigh less than 3 grams. 3. Test hardness: pure gold is softer, it can be scratched with a pin, and there is a tooth mark on the bite. If you need to accurately know the content of precious metal jewelry or if there is a quality dispute, you should go to the jewelry quality inspection agency and use physical or chemical analysis methods for identification. When buying jewelry, you need to carefully check whether the inlay and welding are firm for breaks, burrs, trachoma, etc. Previous: What is 'K' gold Next: Why can K gold jewelry lead the fashion
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