2 thoughts on “Why does gold bring a piece of gray for a while?”
Lee
The main reason for the discoloration of gold jewelry is to wear maintenance problems, that is, wearing it for a long time without cleaning and maintenance, the appearance will be dim. Therefore, the phenomenon of discoloration such as white hair and dullness is not necessarily a quality problem such as purity adulteration. In fact, consumers have misunderstandings about the stability of gold. They believe that gold will not change color, and in fact gold will change color. Gold has the characteristics of high density, low hardness, and high feldling point boiling point. It does not occur at any temperature at any temperature, and is not soluble in hydrochloric acid, nitric acid and other separate acids. The role of salt and other substances does not change. but gold is most afraid of mercury (mercury). After the gold encounters mercury, a chemical reaction will occur, forming a yellow and white material attached to the gold jewelry. The gold jewelry is like fading. The color of gold cannot reach 100%, which contains more or less other metal elements. These metal elements may also have a chemical reaction with other materials, resulting in gold discoloration. Therefore, gold wearing gray may be a chemical reaction. Extended information: In daily life, in addition to the practitioners in the chemical industry, ordinary consumers may also be exposed to mercury -containing items, such as mercury -containing cosmetics. After the summer, high temperature weather leads to more sweats in the human body, and the position of the neck and wrist is more likely to sweat, which may cause golden discoloration. The consumers should avoid long -term contact with acidic, alkaline substances and sweat stains. When taking a bath, they should remove the gold decoration as much as possible. Experts also suggested that in order to avoid such disputes, Jindian merchants should explain to consumers the correct use and preservation method of gold decoration. If the gold jewelry is discolored and faded, you can find the brand after -sales department for cleaning and maintenance. Reference information Source: People's Daily-Total value of 780,000 yuan Gold decoration is dark or related to improper wearing
It may be contact with cosmetics, or the human body's sweat, etc., such as chemical reactions and surface oxidation. You can bring the purchase invoice to the purchase of the after -sales service for the purchase of the store.
The recent more and more customers found that the gold jewelry they wore turned black, or it turned white. I always felt that there was a problem with the gold I bought. The cause of gold jewelry is white or black. The 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 alloy", 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 alloy". It contains trace lead, and gold encounters lead capacity. Especially in the summer, the sunscreen whitening creams commonly used by ladies in the summer are extremely high, and the most likely to cause this phenomenon. For the above two gold jewelry that has been turned 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. Gold jewelry restored. 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 wearing a platinum ring on the adjacent fingers, because the fingers are often moving, it is easy to cause the golden ring and the platinum ring to rub each other, so that the gold The surface of the jewelry is part of the platinum white hair. 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 18KGP jewelry like the appearance and gold jewelry, the interior is generally copper or copper -containing gold, and the appearance is placed in gold. After using it for a period of time, the local forging layer of the local area may be worn or falling off, revealing the exposure The 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's local darkening is 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. It some who replaced the old -fashioned people said that the necklace I handed to them was golden yellow. When returned to me, there were many small black spots. Black, this is exactly the saying that "real gold is not afraid of fire", and the original golden yellow is still golden yellow, which shows that the gold content of the necklace is not enough. There is generally no good way to restore the golden yellow caused by the black caused by welding, unless the entire necklace is forged.
The main reason for the discoloration of gold jewelry is to wear maintenance problems, that is, wearing it for a long time without cleaning and maintenance, the appearance will be dim. Therefore, the phenomenon of discoloration such as white hair and dullness is not necessarily a quality problem such as purity adulteration.
In fact, consumers have misunderstandings about the stability of gold. They believe that gold will not change color, and in fact gold will change color. Gold has the characteristics of high density, low hardness, and high feldling point boiling point. It does not occur at any temperature at any temperature, and is not soluble in hydrochloric acid, nitric acid and other separate acids. The role of salt and other substances does not change.
but gold is most afraid of mercury (mercury). After the gold encounters mercury, a chemical reaction will occur, forming a yellow and white material attached to the gold jewelry. The gold jewelry is like fading. The color of gold cannot reach 100%, which contains more or less other metal elements. These metal elements may also have a chemical reaction with other materials, resulting in gold discoloration. Therefore, gold wearing gray may be a chemical reaction.
Extended information:
In daily life, in addition to the practitioners in the chemical industry, ordinary consumers may also be exposed to mercury -containing items, such as mercury -containing cosmetics. After the summer, high temperature weather leads to more sweats in the human body, and the position of the neck and wrist is more likely to sweat, which may cause golden discoloration.
The consumers should avoid long -term contact with acidic, alkaline substances and sweat stains. When taking a bath, they should remove the gold decoration as much as possible. Experts also suggested that in order to avoid such disputes, Jindian merchants should explain to consumers the correct use and preservation method of gold decoration. If the gold jewelry is discolored and faded, you can find the brand after -sales department for cleaning and maintenance.
Reference information Source: People's Daily-Total value of 780,000 yuan Gold decoration is dark or related to improper wearing
It may be contact with cosmetics, or the human body's sweat, etc., such as chemical reactions and surface oxidation. You can bring the purchase invoice to the purchase of the after -sales service for the purchase of the store.
The recent more and more customers found that the gold jewelry they wore turned black, or it turned white. I always felt that there was a problem with the gold I bought. The cause of gold jewelry is white or black.
The 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 alloy", 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 alloy". It contains trace lead, and gold encounters lead capacity. Especially in the summer, the sunscreen whitening creams commonly used by ladies in the summer are extremely high, and the most likely to cause this phenomenon.
For the above two gold jewelry that has been turned 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. Gold jewelry restored. 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 wearing a platinum ring on the adjacent fingers, because the fingers are often moving, it is easy to cause the golden ring and the platinum ring to rub each other, so that the gold The surface of the jewelry is part of the platinum white hair. 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 18KGP jewelry like the appearance and gold jewelry, the interior is generally copper or copper -containing gold, and the appearance is placed in gold. After using it for a period of time, the local forging layer of the local area may be worn or falling off, revealing the exposure The 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's local darkening is 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.
It some who replaced the old -fashioned people said that the necklace I handed to them was golden yellow. When returned to me, there were many small black spots. Black, this is exactly the saying that "real gold is not afraid of fire", and the original golden yellow is still golden yellow, which shows that the gold content of the necklace is not enough. There is generally no good way to restore the golden yellow caused by the black caused by welding, unless the entire necklace is forged.