How much can the maximum purity of the gold reaches the highest purity?
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How much can the maximum purity of the gold reaches the highest purity?
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The jewelry made of gold as the material mainly includes two categories: pure gold jewelry and K gold jewelry.
Pure gold jewelry, also known as foot gold jewelry. Gold is not red, and the purest gold can only reach 99.9999%. It is a "reagent gold" specially used as a standard reagent. The content of pure gold jewelry sold in jewelry stores is actually 99%and 9999%. The former is called "two -nine gold", and the latter is called "four -nine gold".
k gold refers to adding a certain percentage of silver, copper, zinc and other metals to gold to increase its strength and toughness. Karatgold's "K" is the abbreviation of "Karat". The calculation method of K gold is to divide the highest content of pure gold into 24K, and the gold content of each K is 4.166%(every K is 4.15%per k in the early days of the founding of the People's Republic of China)
k gold has 24K, 22K, 20K, 18K, 14K, 12K, 9K, 9K, 9K , Commonly two types: 18K (75%gold content) and 14K (gold content 58.33%)