pom pom jewelry wholesale How to identify jewelry is gold or silver?
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pom pom jewelry wholesale How to identify jewelry is gold or silver?
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metal jewelry charms wholesale There are usually several identification methods for identifying silver jewelry. : 1. Color method: Observe with the eyes, it looks white, shiny, and fine, is a silver jewelry with high color; poor color, most of the pseudo -silver jewelry. 2. Bending method: Lightly folded silver jewelry with your hands, easy to bend and not easy to break; stiff and barely folding color is low; It is not lighter, and it is easy to break. 3. Nitric acid identification method: Use glass rod to drop the nitric acid at the mouth of the silver jewelry, which is brown rice and slightly green. It has a dark green and black color. 4. Throwing method: Throw the silver jewelry from top to bottom on the table. The bouncing is not high, and the sound is smooth as a high -colored silver jewelry; Or low -colored silver jewelry.
gold, which has the characteristics of high density, small hardness, and stable chemical properties. Knowing these characteristics is easy to identify.
1. Gold is much heavier than steel. The gold and iron of the same volume are gold and light. When you recognize it, you can know it with your hands.
2. Gold's hardness is small, which can be used for bending tests. Real gold is easy to change; fakes are easy to break and bend. Or use the copper key to draw on the gold product, the real gold has obvious traces, and the false traces are blurred.
3. Throwing the identification: throwing the gold product on the table, the real gold sound lubricate, not lubricating; the fake sound is crisp and beating.
4. Place the jewelry in acidic liquids such as dilute hydrochloric acid and nitric acid. The real gold color remains unchanged, while the copper will lose its gloss as soon as it touchs.
5. Real gold is not afraid of fire. It is resistant to burning in the fire. After the fake gold is burned, it becomes black -purple and loses light.
wholesale jewelry ottawa Identification of silver:
(1) You can distinguish from color first. The higher the purity of the silver, the white the silver, and the surface of the jewelry looks uniform. If it contains lead or copper, the jewelry will be blue -gray or rough.
(2) Then you can distinguish from weight. Silver's density is slightly larger than common metals, so silver jewelry is heavier.
(3) You can also see the hardness of the jewelry. The hardness of the silver is lower than that of copper, but it is larger than the lead and tin. Consumers can use large head needles to draw the surface of jewelry. If the needle is slippery and it is difficult to leave traces, this jewelry may be copper. Tin, if there are less obvious traces, can be preliminarily determined as silver jewelry.
(4) At last the sound can be listened. The sterling silver jewelry is sounded, the lower, the lower the sound, the lower the sound. If it is copper, the sound is high and sharp. If it is lead and tin texture, the sound is dull and short.
(5) If there is nitric acid, then a little bit of air bubbles will be reacted on the silver product. After the end of the color, the color of the surface can be preliminarily determined by the silver content. "In other words, if the color of the silver product surface is green, it contains about 70 % of the silver content, and the rest are copper. If the color is basically unchanged, its silver content is more than 95%.
The identification of gold:
(1) See 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 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.
(2) Type 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 draw light marks with nails. Teeth bite can leave tooth marks. High -colored gold jewelry is low in color. 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: Throwing the 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: Burn the jewelry to burn red (do not melt the jewelry) with the fire (do not melt the jewelry), and observe the color change after cooling. The degree of darker 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) Seeing the mark: Domestic gold jewelry is all prepared according to international standards, and the killing records, such as "24K" indicate "foot red" or "foot gold"; 18K gold, "18K", indicate "18K" Words, those who are lower than 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.