How many types of gold are divided, what does 24K mean? Is the difference between foot gold and thousands of gold? Please introduce to your friends to introduce. Thank you!
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Each (English Carat, German Karat abbreviation, often writing "K") gold content is 4.166%, 18K = 18*4.166%= 74.998%, 24K = 24*4.166%= 99.984%
24k gold 99%gold containing 99% , 22K contains 91.7%, 18K contains 75.1%, 14K contains 58.5%, and 12K contains 50%.
The gold jewelry currently sold in the market is divided into foot gold and K gold jewelry. According to the provisions of the national standard GB11887, the content of several common gold jewelry is:
24K -the current market occasional label There are 24K gold jewelry. According to national standards, the theoretical value of 24K gold content should be 100 %, and gold has no barefoot. Therefore, it is strictly that 24K does not exist. The sales of 24K gold in sales are incorrect and do not meet national standards.
Thousands of gold -content is 99.9%, commonly known as three 9.
The gold -content is 99.0%, above, commonly known as two 9.
18K — the content is 75.0%. There are many colors of K gold, usually with yellow, red, and white. Among them, white K gold is actually alloy of gold, nickel, zinc, copper and other elements. It is not usually called platinum jewelry. Platinum refers to the expensive metal platinum (PT)
Maipan how to distinguish between true and false and quality when buying jewelry?
. View mark
National standards stipulate that precious metal jewelry should be produced, manufacturers, materials and content marks, and unsproting products are unqualified products. If a quality problem, quality inspection agencies may be given inspection and judgment according to the mark. Consumers should purchase the brand they need and the gold jewelry of different gold content according to the mark.
. Sensory inspection method:
1. Seeing color: Foot gold is dark yellow, K gold has yellow, red, white and other colors, and the imitation gold products are mostly copper alloy with lighter color.
2. 量 weight: The proportion of gold is 19.3g/cm3, which is much higher than the proportion of imitation gold products. For example, a foot gold ring is about 5 grams, and the same size imitation gold products are generally less than 3 grams.
3. Test hardness: Pure gold is soft, scratches with large head needles, bite tooth marks with teeth.
. If you need to accurately know the content of precious metal jewelry or quality disputes, you should go to the jewelry quality inspection institution and use a physical or chemical analysis method for identification. When buying jewelry, you also need to carefully check whether the stones are inlaid, whether the welding is firm or broken, burrs, trachoma, etc.
The maintenance of jewelry: When wearing and stored in gold jewelry, you should avoid contact with items such as lead and mercury (mercury), otherwise the surface of the jewelry will be discolored. Dry the jewelry during drying and bathing to prevent wear or bumps, let alone pull it hard to avoid deformation or broken.
In the jewelry for a period of time, there may be dirt, dark color, soak with a washing spirit, brushing it gently with a soft brush, rinse with water, and wear it after drying.
Refers to 99.99 % pure gold
1, k: refers to the purity of gold.
2, purity: refers to the brightness of color. From a scientific perspective, the brightness of a color depends on the single level of the light transmission of light. Human eyes can distinguish the color of monochrome characteristics, all of which have a certain degree of brightness. Different hue is not only different, but also different purity. For example, the red in the pigment is the most purified hue. The color of orange, yellow, and purple is also high in the pigment. Blue and green are the lowest purity in the pigment. In the daily visual range, most of the colors seen in the eyes are gray color, that is, unsaturated colors. With the change of purity, it makes the world so rich in color. Even if the same color changes have undergone subtle changes in purity, it will bring changes in color character.
The abbreviation of each opening (English carat and German Karat, often writing "K") gold content is 4.166%, 18K = 18*4.166%= 74.998%, 24K = 24*4.166%= 99.984%
24k 99%gold, 22K contains 91.7%, 18K contains 75.1%, 14K contains 58.5%, and 12K contains 50%.
3. Content
The gold jewelry currently sold in the market is divided into foot gold and K gold jewelry, which are based on national standard GB11887.
Mrely common gold jewelry content is:
24k -currently the market occasionally marked with 24K gold jewelry. According to national standards, the theoretical value of 24K gold content should be 100 %, gold is barefoot, so strictly speaking 24K does not exist. It is incorrect to sell 24K gold in sales and does not meet national standards.
Thousands of gold -content is 99.9%, commonly known as three 9.
The gold -content is 99.0%, above, commonly known as two 9.
18K -The content is 75.0%, and there are many colors of K gold, usually with yellow, red, and white. Among them, white K gold is actually alloy of gold, nickel, zinc, copper and other elements. It is not usually called platinum jewelry. Platinum refers to the precious metal platinum (PT)
4. Test
How to distinguish between true and false and quality when buying jewelry?
1.
C view of the mark
The national standards stipulate that precious metal jewelry should be produced, manufacturers, materials and content marks, and unscayed products are unqualified products. If a quality problem, quality inspection agencies may be given inspection and judgment according to the mark. Consumers should purchase the brand they need and the gold jewelry of different gold content according to the mark.
.
Sensin inspection method:
1,
It color: dark yellow, K gold has yellow, red, white and other colors, and most imitation gold products are mostly Copper alloy, shallow color.
2,
: The proportion of gold is 19.3g/cm3, which is much higher than the proportion of imitation gold products. For example, a foot gold ring is about 5 grams, and the same size of imitation gold products generally less than 3 grams weighing weights. Essence
3,
The test hardness: pure gold is soft, scratches with large head needles, bite tooth marks with teeth.
. As the saying goes, "Gold is not red", generally gold jewelry contains other metals with less than 1%. Regarding the color content of gold products, the national standards have clear regulations, that is, 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.
The common ones in the market are gold, silver, platinum and gold, and the latter three are white. K Gold 22K 18K 14K 8K (Platinum Gold Gold) is expressed by K = 4.166%of the purity of gold and gold, and 18K and 24K are common in China. 99.9%), 18K gold contains other elements, which have different colors due to different proportions. Common white (called platinum in the market), yellow, rose, and G750 are marked.
The content score after each jewelry is followed by metal symbols, indicating purity.
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24K means the meaning of sufficient gold
Copic gold has thousands of gold, foot gold, 18K gold,
n thousand foot gold: The mark is "Thousands of Gold", "999 Gold", "G999" or "GOLD999"
Foot gold: gold content ≥99%, the mark is "foot gold", "990 gold", "G990" Or "GOLD990"
18k gold: gold content ≥75%, imprint as "18K", "AU750", "G750"
24K indicates 100%. Without this metal, there is no
The purity of the foot gold is not less than 990th, and the purity of thousands of gold is not less than 999
1k = 4.1666%. Can be made.