Have you ever noticed when you buy gold?
Why do some gold jewelry have a steel seal marked with pure gold 999 and pure gold 9999, while some are marked with 24k, 18k and so on?
So what do these stamped logos mean?
Who is better for the gold marked with pure gold 999 and 24k?
This one is full of dry goods, everyone who needs it must collect it!
All right! Without further ado, let's get started!
Pure gold
Let's start with pure gold.
Our country stipulates that gold content of more than 99.0% is called pure gold!
Pure gold is gold with a gold content greater than 99.90%.
Pure gold is gold with a gold content greater than 99.99%.
But since 2014, the mainland has canceled the term "10000 pure gold" and "10,000 pure gold".
Even if the gold content reaches 1,000 feet and 10,000 feet, it can only be called pure gold.
That's why there is a pure gold 999 or pure gold 9999 mark.
Many merchants who mark it this way mean that their gold content has reached 1,000 pure gold or 10,000 pure gold.
In addition to "pure gold", the commonly used jewelry imprints of gold also include "AU", "G", etc., followed by the gold content of gold.
AU stands for the chemical element of gold.
G is the initials of Gold.
The annotation content must have material and purity, consisting of two parts! Indispensable!
Therefore, there are expressions such as "G990", "AU990", "Gold 999", "AU999", "Pure Gold 9999" and so on.
The above are all common gold steel seal logos in China, that is, the logos stipulated by our country, and the ones used in the international market are K system!
K-system
24K gold is actually the internationally used K system!
It is also a way to express the gold content of gold!
The K system is calculated by dividing 100% pure gold into 24 equal parts, so 1k ≈ 4.166% gold content!
In mainland China, karat gold is also known as colored gold, which is simply an alloy of gold and other metals.
Both fineness and K value refer to the gold content of gold!
The higher the fineness and K value, the higher the gold content!
Then pure gold is 24K gold, but 24K gold is actually only theoretically achievable gold purity, that is, gold with a purity of 100%.
But because the current technology is not enough to refine 100% pure gold, it can only be infinitely close to 100%!
So our country has canceled the statement of 24K gold!
Changed to the description of pure gold, that is, gold with a gold content of 99.0% is the highest content of gold!
But in the world, we still use this set of sayings, and we must pay attention to this when buying gold abroad!
In addition to 24k gold, common K gold includes 22k gold, 18K gold, 9K gold, and so on.
K gold loses its high gold content due to the addition of other metals.
The result is a higher hardness and a richer color of karat gold.
That's why international brands love to use K gold to make jewelry!
Therefore, there is no better way to say about pure gold 999 and 24K gold, but the way of expression is different.
But in comparison, our domestic expression is clearer and clearer!
All right! I'll share it with you today!
What is your gold jewellery logo?
What else do you want to know?
Welcome to leave a message in the comment area to tell me!