The gold coin indicates how much K means K, is it pure gold?
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The gold coin indicates how much K means K, is it pure gold?
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24K. This is an irregular saying.
This is a saying in the West, defining a gold product with 100%gold content of 24K gold.
For the current scientific and technological level, it is impossible to refine pure gold materials with a purity of 100%. Therefore, the golden position standard K in the gold content in the gold products generally refers to the pure gold as 24K gold, but it is theoretically gold with 100%gold, which actually does not exist. Therefore, in the national standard, the gold content of the merchants that the gold jewelry must not use the irregular standards of "24K gold". Since the pure gold is 24K, that is, the theoretical gold content is 100%, then 1K means that gold products contain pure gold 1/24, about 4.16%. 18K gold represents the gold content of 18/24, which is 75%of pure gold, and the rest are other materials such as silver or copper.
The national standards clearly stipulate that each gold jewelry sold by merchants must be listed to indicate its gold content and weight. The weight of the gold jewelry is all used in the national statutory unit. Its gold content should use "K gold" (excluding 24K gold), "foot gold" (not less than 99%), "thousands of gold" (not less than 99.9%). Pure gold "" 24K gold, "9999" and other irregular standard methods that actually do not exist.
999 pure gold, called thousands of gold. It is a noble variety in pure gold. Generally, 18K, 22K, and 24K are between 25 and 99.8 in pure gold. However, the 999 thousands of gold is a pure gold that is merged from the merger of strata minerals.
Eunnan 999, higher than the usual 24K.
There is a thousand foot gold