wholesale jewelry korean supplier How to detect gold
7 thoughts on “wholesale jewelry korean supplier How to detect gold”
Leave a Comment
You must be logged in to post a comment.
wholesale jewelry korean supplier How to detect gold
You must be logged in to post a comment.
cheapest wholesale jewelry boxes 1. Look at the color: the higher the purity of the gold jewelry, the deeper the color. If there is no gold medal, you can determine the general color according to the following color (based on green gold. The so -called green gold contains only silver components in gold);
2, dark red yellow color is more than 95 %, light red yellow yellow color 90-95 %, pale yellow is 80-85 %, blue yellow 65-70 %, color blue with white light is only 50-60 %, and slightly yellow and less than 50 %.
3, see hardness: pure gold is soft and low, and shallow marks can be used to use nails. Teeth bite can leave tooth prints. High -quality gold jewelry is low in color. The harder, the bending method can also test the hardness, the pure gold is soft, it is easy to bend, the lower the purity, the less likely to bend.
4, listening to the sound: real gold with more than 99 % to throw it on the hard ground, it will make a tap sound, there is no rhyme or elasticity. The fake or low golden sound is crispy but no dullness. Generally, the sound of "Dangdang" is emitted, and there are surplus sounds.
5. Burning with fire: The jewelry will be burned red (do not melt the jewelry) with the fire (do not melt the jewelry), and observe the color change after cooling. If the color becomes darker or different degrees of black, it is not pure gold. Generally, the lower the color, the stronger the color, and the darkens are all, indicating that it is a fake gold jewelry.
The expansion information:
Golden four textures
1, red gold and pure gold are close, but due to the different time and local standards, the standards of Chijin are different. The color reaching 99.6%is called Chijin. The red gold in the territory is generally between 99.2%-99.6%.
2, color gold, also known as "secondary gold" and "tide gold", refers to the low color. Due to the different metal content of these gold, the high color is 99%high, and only 30%of the low.
3. According to different other metals, cooked gold can be divided into colorful gold, mixed gold, K gold, etc. The color gold refers to gold only mixed with silver components, regardless of whether it is high or low. There are more color gold, commonly in gold bars, gold ingots, gold blocks and various utensils and gold jewelry.
4, mixed gold refers to the gold inside the gold, in addition to the silver, but also contains other metals such as copper, zinc, lead, and iron. Depending on the type and quantity of the metal contained in, it can be divided into small mixed gold, large mixed gold, bronze mixed gold, and lead -containing large mixed gold.
5, K gold refers to gold and copper according to a certain proportion of gold, and according to the formula of 24K formulas. Generally speaking, the more the proportion of k gold is silver, the more colorful the color; the large copper ratio is purple.
6, K values are just a rough number, and it is not very accurate. Most of them are used to use even K value, such as 24K, 22K, 20K, 18K, etc.
7, 18K means that 24 copies of alloys contain 18 copies, which is equivalent to about 75%. K gold calculation method: The calculation formula of K gold is equivalent to the gold content: K value ÷ 24 × 100%(that is, K value × 4.1667%)
Reference materials Source: Baidu Encyclopedia: Gold
j crew jewelry wholesale There are generally six mainstream methods to detect gold. The following is a detailed introduction:
. Visual inspection
1. The official sign of checking gold. Generally, 999 or 990, or 10K, 18K, 22K, 24K. It is not considered lower than 10K, because the content of gold is too low. If you observe with a magnifying glass, you will see more carefully.
2, ancient gold jewelry will not have obvious official purity logos.
3, of course, there will be official signs of counterfeit gold jewelry, so further inspections need to be performed.
4, find obvious discoloration. Check the wear area of the golden surface, which is usually on the edge of the golden products to check the color change there. If the golden color disappears and becomes another color, then this product is just a gold -plated.
. The bromine chemistry test
1. Put the golden products into the alcohol solution for a small meeting.
2. Pour a filter paper sperm solution.
3. At this time, the filter paper becomes gray -purple.
4, drop 4 drops of bromo -A reagent to the filter paper, if the filter paper becomes white, then this gold product is real gold.
The test time takes 20 minutes.
. Magnetic test
This is a simple test, but it is not a sufficient proof to prove whether it is true gold. You can find a powerful magnet for testing.
Gold is not a magnetic metal. If your product is attracted by magnets, it is enough to prove that this product is not gold. But you can't prove that it is gold because your product does not respond to magnets, because there are many non -magnetic metals.
. The density test only has a very small metal density than gold
. The density of pure 24K gold is about 19.3 grams/ml, which is much higher than other metals. The density test method is enough to prove that your product is gold. The higher the density, the higher the purity of gold. Make sure your product has no additional gem.
1. If you do not have equipment in this area, jewelry shops can usually do density testing for you.
2, you can put your golden products in the container full of water, and then test the volume of overflowing water, and then except for the weight of the product you call, that is, the density of your gold product. Keep in mind that different gold purity has different grams/ml ratio: 14k- 12.9 ~ 14.6 grams/ml 18k gold-15.2 to 15.9 grams/ml 18k platinum-14.7 ~ 16.9 grams/ml 22k-17.7 % to 17.8 grams to 17.8 grams /Ml.
. Bite test
We have all watched movies, and the mininger bite gold to test it. We also see that when the Olympic athletes get the gold medal, they will bite their "gold" medal. How simple this test is.
1, bite a gently.
2. Check your bite marks. The deeper the bite marks, the higher the purity of the gold.
Actually, this is not recommended for testing, which will damage your teeth. What's more, the lead will be given to the gold, and the lead is softer.
6. Ceramic scratch testing
1. Using unlawish ceramics. If you don't have this, you can buy it from a ceramic shop.
2. Cover your gold products with ceramics. If it is a black scratch, it means that your product is not gold. If it is a golden scratch, it proves that your product is gold.
Summary: The above six methods can be tested by themselves. If the professional results are required, please go to a regular appraisal agency for testing.
jewelry wholesale in los angeles california Are you detecting gold jewelry? If you test the purity, you must go to the local quality supervision bureau or the local formal large -scale pawn. If you just judge whether it is gold, I will give you a few tricks:
It simply introduce some identification methods. (1) See color: the higher the purity of the gold jewelry, the deeper the color. If there is no gold medal, you can determine the general color according to the following color (based on green gold. The so-called green gold contains only silver ingredients in gold); dark red yellow color is more than 95 %, light red yellow 90-95 % The pale yellow is 80-85 %, the cyan is 65-70 %, and the white light is only 50--60 % white light. The slightly yellow and white are less than 50 %. Generally, Qiqing, Eight Huang, and Jiu Chi can be used as a reference.
: weight: The proportion of gold is 19.32, which is more important than metal such as silver, copper, lead, zinc, aluminum. The volume of gold is more than 40 % heavier than the silver, 1.2 times heavier than copper, and 6.1 times heavier than aluminum. The gold jewelry should have a feeling of sinking in the hand, and the fake gold jewelry feels lightly. This method is not suitable for gold jewelry inlaid. (3) Look at the hardness: pure gold is soft and low. It can be used to draw light marks with nails. Teeth bite can leave dental marks. High -colored gold jewelry is low in color. It can also test hardness, pure gold is soft, easy to bend, the lower the purity, the less likely to bend. (4) Listening to the sound: Throwing the real gold with more than 99 % of the color will make a tap sound, there is no rhyme or elasticity. The fake or low golden sound is crispy but no dullness. Generally, the sound of "Dangdang" is emitted, and there are surplus sounds. (5) Burning with fire: The jewelry will be burned red (do not melt the jewelry) with the fire (do not melt the jewelry). After cooling, observe the color change. If the surface is still the original golden color is pure gold; It is not pure gold. Generally, the lower the color, the stronger the color, and the darkens are all, indicating that it is a fake gold jewelry. (6)看标记:国产黄金饰品都是按国际标准提纯配制成的,并打上戮记,如“24K”标明“足赤”或“足金”;18K金,标明“18K”字样,成色低Those who are in LOK can not play the K -printed number according to regulations. At present, illegal elements are commonly used to manufacture fake cards and imitation stamps in the society. They use rare gold, Asian gold, and even brass to impersonate real gold. Therefore, the identification of gold jewelry must be comprehensively determined according to the sample to determine the true and false and the quality of the real. There are two common methods for accurate identification of gold jewelry. (1)试金石法:选择质地细腻的黑色试金石,用含金量不等的标准试金片(对金牌)在试金石上划出痕迹,再将所要鉴定的金饰样品在同一试金石上划痕,滴上Remove the impurities of concentrated nitric acid, and find the traces left on the test gold stones compared with the traces of the tested samples, find the same color as the jewelry sample, and the standard degree of control of the sample gold is the accurate gold content of the gold jewelry sample to determine the gold jewelry sample Essence (2) Chemistry method: Also known as reagent test method. Gold is insoluble in separate nitric acid, sulfuric acid, and hydrochloric acid, and silver and copper ingredients can be dissolved with nitric acid. Take gold decorative sample. Putting nitric acid on a certain part, if gold will not change color, if it is silver products, it will generate silver oxide and turn black; For gold jewelry with a gold content of more than 95 %, test with nitric acid, the surface changes very small.
Gold and silver jewelry mark: Foot gold: 9999, thousands of gold, pure gold and other K gold: 18K is the most common,
platinum: PT950, PT900 钯 钯: PD950, PD900 silver: 925 (general accessories) are not The so-called sterling silver [2010-07-28 11:12]
wholesale jewelry shows near me The purity of the long time is the authenticity of the gold you buy
wholesale herkimer diamond jewelry In addition to the distortion of physical symptoms such as simple color hardness and weight of sound mark scratches, the professional methods that can be used to detect gold jewelry are:
1 burning melting
2 Surface meter
3x fluorescent gold measuring instrument detection r r
4 Water immersion density ratio test
5 The burst test of the chip machine contains
6 bromo, nitric acid droplets, and the solution tests
ordinary shops do not recognize the value of gold process. Boil and melt directly to see the color weight. In addition to the third X fluorescent golden meter, the middle store may be used. Professional institutions and large professional chain stores will use X fluorescent golden meters. The price is expensive and the normal charging is between 100-300
sterling silver jewelry supplies wholesale
rhinestone wedding jewelry wholesale