5 thoughts on “How did the gold necklace wears black for a while? Is it fake?”
Janie
It is fake, the reason is as follows: 1, the color of gold is golden yellow, metallic luster, difficult to break down. 2, gold, as a precious metal, has good physical characteristics. "Real gold is not afraid of fire refining" is that the chemical stability of gold is very high. It is not easy to have chemical reactions with other substances. Do not worry about oxidation and discoloration. Even in the melting state, it will not be oxidized and discolored. 3, the chemical properties of gold are stable, and have strong corrosion resistance. In the air, even at high temperatures, they do not respond to oxygen (except for pure oxygen at specific conditions). The chemical properties are very stable with sulfur, which is stronger than silver (silver will oxidize silver oxide at 1500 degrees, and gold does not respond to oxygen even if gold is 3000 degrees). 4, although the gold itself is not corroded, it has a very strong chemical affinity with sulfide, and it is easy to absorb hydrogen sulfuric acid gas in the air. The surface shows dark colors such as orange, brown -red and other colors. The expansion information If discrimination and adulteration: 1. Whether gold has white highlights In material cutting to cut gold bars or gold jewelry and observe the cut surface with a magnifying glass. If you see a white highlight Because gold and 融 cannot be fused together, it means that the gold is mixed with 铱. 2, measured the proportion. In the weight of a pure gold bars with an balance, and then put the gold bars into a measuring cup and flood the gold bar. Then put the detected gold bars in a measuring cup, whether the scale of the water rises or decreases. As long as it changes, it means that the gold bar is not pure gold. But if it is gold jewelry, this method is not applicable because there is air in gold jewelry. 3, real gold is not afraid of fire. This gold bars or gold jewelry burned for a while to observe its changes. Because the oxidation reaction occurs with oxygen in the air, the gold bars with insufficient purity will become gray; and the color of the pure gold will be red after the fire is baked. However, this method may be destroyed to jewelry. The cleaning method: 1. Protect the gloss of the gold jewelry, you can apply a layer of nail polish thinly on it. 2. If there are black silver films on the surface, 2 grams of salt, 7 grams of soda, 8 grams of bleaching powder, 60 ml of clear water, are made into a "golden device cleaning agent", put the gold jewelry in a bowl, and the golden jewelry is in a bowl. Pour in the cleaning agent. After 2 hours, remove the golden jewelry, rinse with water (preferably not hard water), buried in the wood chips to dry, and then wipe it with a soft cloth. 3, the ring inlaid with a cotton roll with a popsicle or match stick, wet the gemstone and its frame in the mixed fluid of the dew and glycerin, and then use the velvet cloth to brighten the ring. Do not scrape it with a kind of sharp objects. 4, salt and vinegar mixed synthetic cleaning agent, using it to wipe the pure gold jewelry, which can make a long time. 5, wipe or scrub with hot rice soup with hot rice, can also restore gloss. 6, scrubbing with ammonia water. Reference materials Source: Baidu Encyclopedia-Gold
If you are real gold, then the current situation may be ... you will understand if you look at it!
Plores after wearing gold jewelry for a period of time, they found discoloration or fading. Many people think that this is the insufficient color of gold jewelry. question. So, what is the reason to cause gold jewelry to change color or fade unexpectedly?
Wang Naizhu, Secretary -General of the Baoyu Stone Association of Fujian Province, told reporters that the discoloration or fading of gold jewelry is closely related to the human sweat. 99 % of human sweats are water, and about 1 % are waste and harmful substances in the human body, such as chlorine substitutes, lactic acid, urea ammonia, etc. After contacting the silver and copper in gold jewelry in gold jewelry, chemical reactions will occur, producing silver chloride and copper sulfide, and showing dark black chemical salt. These chemical salts are often dropped from gold jewelry, contaminating the skin of the wearer, leaving very obvious black stains on the skin. On the skin of the jewelry, the opportunity of cosmetics containing chemicals and the golden jewelry that is most afraid of chemical erosion will be discussed, causing discoloration. Some cosmetics also contain some fine hard particles, which can form another type of dirt, thereby wear gold jewelry.
Gold maintenance tips
gold jewelry is not very delicate, but if you do not care carefully, it will also lose its original gloss and charm. Generally speaking, beware of the following points:
1, the chemicals of cleaning essence will change the color of the gold, so you should take off the gold jewelry before doing cleaning.
2. Avoid contact with high volatile substances such as perfume and glue directly, otherwise it will easily cause gold decoration to fade.
3, the gold decoration should be removed when swimming to avoid chemical changes in the surface layer after encountering seawater or pool water.
4. Put the velvet cloth and put it in the jewelry box when storage to avoid friction and damage to each other.
5, gold is soft and easy to deform, so do not pull the necklace and other accessories to avoid deformation.
6. Pure gold jewelry will have a chemical reaction when it encounters water and silver. White spots appear. When cleaning, you can restore the original color as long as you grill under the alcohol lamp for a while.
7. The gold jewelry after wearing is often lost due to stains and dust stains. At this time, as long as the gold decoration is placed in the neutral detergent, Just do it.
Gold jewelry contains gold. When gold encounters mercury, it will respond to each other to generate a "gold -mercury agent", that is, it becomes "golden mercury containing gold", and the color is white. There are many types of cosmetics nowadays. Some cosmetics contain trace mercury. When using cosmetics, accidentally encounter gold jewelry, which will turn white and generate "golden mercury with gold". The agent contains a trace lead, and the gold encounters the lead capacity. For the above two gold jewelry that has become white and black, it can be heated with the gasoline spray wheels used for jewelry processing, because the melting point of mercury and lead is very low. In the heating of the spray wheel, it will volatilize, so that the gold jewelry will restore the gold jewelry. face. Of course, it is best not to wear gold jewelry when applying cosmetics or dyeing to avoid post -troubles.
If people wear a golden ring on a finger of the same hand, and a platinum ring on the adjacent fingers, because the fingers are often moving, it is easy to cause the gold ring and the platinum ring to mutual each other Rong, so that the surface of the gold jewelry is plainly white. In this case, it cannot be used to disappear with gasoline spray wheels, because the melting point of platinum is hundreds of hundreds of hundreds of more than the melting point of gold. For such a white gold jewelry, you can use agate knife planing, or rub it with thick cloth (such as canvas) to restore the gold to brighten.
For 18kctp jewelry like appearance and gold jewelry, the interior is generally copper or copper gold with gold, and the appearance is placed in gold. After a period of time If you drop or fall off, the exposed core copper or copper alloys must be easily oxidized in the air or chemically react to the sweat. 18KCTP forging golden layers of mercury is backward and black, and it generally cannot restore it to the original golden yellow, unless it is once again for electrical forging technology.
The gold necklace is local black and mainly at the connection between the ring and the ring. Because the ring and the ring side of the necklace requires welding, welding medicines need to be welded during welding. Each manufacturer's use of welding drugs is not necessarily the same. Some welding medicines are not high in gold. After soaking, black phenomenon will occur. Some people who replaced the old -fashioned person said that the necklace I handed to them was golden yellow, and there were many small black spots when they were returned to me. This is exactly the saying that "real gold is not afraid of fire refining". After the treatment of the gold, it is still the original golden yellow, which shows that the gold content is insufficient when welding. There is generally no good way to restore the golden yellow caused by the black caused by welding, unless the entire necklace is forged.
Why does gold jewelry wears darkened after a long time? Pay attention to these 3 points n00:00 / 01: 3670% shortcut keys to describe space: Play / suspend ESC: exit full screen ↑: increase volume 10% ↓: reduced volume decrease by 10% →: single fast forward 5 seconds studio Here you can drag no longer appear in the player settings to reopen the small window shortcut key description
It is fake, the reason is as follows:
1, the color of gold is golden yellow, metallic luster, difficult to break down.
2, gold, as a precious metal, has good physical characteristics. "Real gold is not afraid of fire refining" is that the chemical stability of gold is very high. It is not easy to have chemical reactions with other substances. Do not worry about oxidation and discoloration. Even in the melting state, it will not be oxidized and discolored.
3, the chemical properties of gold are stable, and have strong corrosion resistance. In the air, even at high temperatures, they do not respond to oxygen (except for pure oxygen at specific conditions). The chemical properties are very stable with sulfur, which is stronger than silver (silver will oxidize silver oxide at 1500 degrees, and gold does not respond to oxygen even if gold is 3000 degrees).
4, although the gold itself is not corroded, it has a very strong chemical affinity with sulfide, and it is easy to absorb hydrogen sulfuric acid gas in the air. The surface shows dark colors such as orange, brown -red and other colors.
The expansion information
If discrimination and adulteration:
1. Whether gold has white highlights
In material cutting to cut gold bars or gold jewelry and observe the cut surface with a magnifying glass. If you see a white highlight Because gold and 融 cannot be fused together, it means that the gold is mixed with 铱.
2, measured the proportion.
In the weight of a pure gold bars with an balance, and then put the gold bars into a measuring cup and flood the gold bar. Then put the detected gold bars in a measuring cup, whether the scale of the water rises or decreases. As long as it changes, it means that the gold bar is not pure gold. But if it is gold jewelry, this method is not applicable because there is air in gold jewelry.
3, real gold is not afraid of fire.
This gold bars or gold jewelry burned for a while to observe its changes. Because the oxidation reaction occurs with oxygen in the air, the gold bars with insufficient purity will become gray; and the color of the pure gold will be red after the fire is baked. However, this method may be destroyed to jewelry.
The cleaning method:
1. Protect the gloss of the gold jewelry, you can apply a layer of nail polish thinly on it.
2. If there are black silver films on the surface, 2 grams of salt, 7 grams of soda, 8 grams of bleaching powder, 60 ml of clear water, are made into a "golden device cleaning agent", put the gold jewelry in a bowl, and the golden jewelry is in a bowl. Pour in the cleaning agent. After 2 hours, remove the golden jewelry, rinse with water (preferably not hard water), buried in the wood chips to dry, and then wipe it with a soft cloth.
3, the ring inlaid with a cotton roll with a popsicle or match stick, wet the gemstone and its frame in the mixed fluid of the dew and glycerin, and then use the velvet cloth to brighten the ring. Do not scrape it with a kind of sharp objects.
4, salt and vinegar mixed synthetic cleaning agent, using it to wipe the pure gold jewelry, which can make a long time.
5, wipe or scrub with hot rice soup with hot rice, can also restore gloss.
6, scrubbing with ammonia water.
Reference materials Source: Baidu Encyclopedia-Gold
If you are real gold, then the current situation may be ... you will understand if you look at it!
Plores after wearing gold jewelry for a period of time, they found discoloration or fading. Many people think that this is the insufficient color of gold jewelry. question. So, what is the reason to cause gold jewelry to change color or fade unexpectedly?
Wang Naizhu, Secretary -General of the Baoyu Stone Association of Fujian Province, told reporters that the discoloration or fading of gold jewelry is closely related to the human sweat. 99 % of human sweats are water, and about 1 % are waste and harmful substances in the human body, such as chlorine substitutes, lactic acid, urea ammonia, etc. After contacting the silver and copper in gold jewelry in gold jewelry, chemical reactions will occur, producing silver chloride and copper sulfide, and showing dark black chemical salt. These chemical salts are often dropped from gold jewelry, contaminating the skin of the wearer, leaving very obvious black stains on the skin. On the skin of the jewelry, the opportunity of cosmetics containing chemicals and the golden jewelry that is most afraid of chemical erosion will be discussed, causing discoloration. Some cosmetics also contain some fine hard particles, which can form another type of dirt, thereby wear gold jewelry.
Gold maintenance tips
gold jewelry is not very delicate, but if you do not care carefully, it will also lose its original gloss and charm. Generally speaking, beware of the following points:
1, the chemicals of cleaning essence will change the color of the gold, so you should take off the gold jewelry before doing cleaning.
2. Avoid contact with high volatile substances such as perfume and glue directly, otherwise it will easily cause gold decoration to fade.
3, the gold decoration should be removed when swimming to avoid chemical changes in the surface layer after encountering seawater or pool water.
4. Put the velvet cloth and put it in the jewelry box when storage to avoid friction and damage to each other.
5, gold is soft and easy to deform, so do not pull the necklace and other accessories to avoid deformation.
6. Pure gold jewelry will have a chemical reaction when it encounters water and silver. White spots appear. When cleaning, you can restore the original color as long as you grill under the alcohol lamp for a while.
7. The gold jewelry after wearing is often lost due to stains and dust stains. At this time, as long as the gold decoration is placed in the neutral detergent, Just do it.
Gold jewelry contains gold. When gold encounters mercury, it will respond to each other to generate a "gold -mercury agent", that is, it becomes "golden mercury containing gold", and the color is white. There are many types of cosmetics nowadays. Some cosmetics contain trace mercury. When using cosmetics, accidentally encounter gold jewelry, which will turn white and generate "golden mercury with gold". The agent contains a trace lead, and the gold encounters the lead capacity. For the above two gold jewelry that has become white and black, it can be heated with the gasoline spray wheels used for jewelry processing, because the melting point of mercury and lead is very low. In the heating of the spray wheel, it will volatilize, so that the gold jewelry will restore the gold jewelry. face. Of course, it is best not to wear gold jewelry when applying cosmetics or dyeing to avoid post -troubles.
If people wear a golden ring on a finger of the same hand, and a platinum ring on the adjacent fingers, because the fingers are often moving, it is easy to cause the gold ring and the platinum ring to mutual each other Rong, so that the surface of the gold jewelry is plainly white. In this case, it cannot be used to disappear with gasoline spray wheels, because the melting point of platinum is hundreds of hundreds of hundreds of more than the melting point of gold. For such a white gold jewelry, you can use agate knife planing, or rub it with thick cloth (such as canvas) to restore the gold to brighten.
For 18kctp jewelry like appearance and gold jewelry, the interior is generally copper or copper gold with gold, and the appearance is placed in gold. After a period of time If you drop or fall off, the exposed core copper or copper alloys must be easily oxidized in the air or chemically react to the sweat. 18KCTP forging golden layers of mercury is backward and black, and it generally cannot restore it to the original golden yellow, unless it is once again for electrical forging technology.
The gold necklace is local black and mainly at the connection between the ring and the ring. Because the ring and the ring side of the necklace requires welding, welding medicines need to be welded during welding. Each manufacturer's use of welding drugs is not necessarily the same. Some welding medicines are not high in gold. After soaking, black phenomenon will occur. Some people who replaced the old -fashioned person said that the necklace I handed to them was golden yellow, and there were many small black spots when they were returned to me. This is exactly the saying that "real gold is not afraid of fire refining". After the treatment of the gold, it is still the original golden yellow, which shows that the gold content is insufficient when welding. There is generally no good way to restore the golden yellow caused by the black caused by welding, unless the entire necklace is forged.
Why does gold jewelry wears darkened after a long time? Pay attention to these 3 points
n00:00 / 01: 3670% shortcut keys to describe space: Play / suspend ESC: exit full screen ↑: increase volume 10% ↓: reduced volume decrease by 10% →: single fast forward 5 seconds studio Here you can drag no longer appear in the player settings to reopen the small window shortcut key description
Must be tooth gold