Silver for a while, white for a while, black for a while

**Jewelry, silver handicrafts, often change color over time.

The laws of nature tell us that after any substance absorbs energy, it becomes unstable in a high-energy state, which is scientifically called"Thermodynamic instability"。As a result, the metal naturally and continuously emits energy in an effort to return to its primitive, extremely stable state of ore. For example, ** is the metal silver obtained by heating silver pyroxene (AG2S) at high temperature, which becomes very unstable due to the increase of its own energy on the one hand.

Another important factor is that there is a great affinity between silver and sulfur, scientists have determined that when silver encounters hydrogen sulfide gas or sulfur ions in the air, it is easy to produce an extremely insoluble silver salt (ag2s) (silver salt is the main component of silver pyroxenite), this chemical change can occur in very small amounts, as long as silver encounters a few trillions to tens of trillions of parts per trillion hydrogen sulfide or sulfur ions in the air, the following chemical reactions will occur:

4AG+2H2S+O2=2AG2S (black product) + 2H2O The reaction result is that silver sulfide is produced on the surface of silver, because silver sulfide is gray-black, so with the intensification of the reaction, the silver sulfide increases and thickens, and the surface color gradually changes from white to yellow to gray and finally to black.

And where does silver sulfide come from? It is a natural product. First of all, the feces of people and animals are decomposed by bacteria to produce a large amount of hydrogen sulfide, and the proteins in the plant body also produce hydrogen sulfide after decay; In addition, human sweat also contains sulfur, which can discolor silver when it comes into contact with silver products, especially the hydrogen sulfide produced by sewage and garbage discharge in urban air, so it is not surprising that silver changes color.

As for why you don't understand why it's only blackened, it may be that the other plating layers are a little thicker!

Not all silver jewelry gets brighter the more you wear it, but the Tibetan silver will get brighter and brighter the more you wear it.

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Oxidized by the oxygen in the air, the toothpaste is whitened because the toothpaste contains a friction agent that can brush off the layer of silver oxide on the surface, but it will still be re-oxidized after a period of time.

Silver is an unstable element that is prone to chemical reactions with sulfur, resulting in blackening. Human sweat contains a lot of sulfur, which will work when it comes into contact with silver. Moreover, if people are in some polluted environments, when there are more acidic gases, hydrogen sulfide, nitric oxide and other compounds in the air, it will also cause silver jewelry to turn black.

After not wearing silver jewelry for a period of time, it is easy to oxidize and lose its luster. This is normal. But don't be afraid, hehe.

When this happens, you can take it to a jewelry store to be cleaned and polished, and the silver jewelry will be brand new; If it doesn't oxidize very badly, you can also take care of it yourself at home: the easiest way is to make toothpaste scrub the surface of the jewelry; There is a silver cloth on the market that can easily polish silver jewelry, but only if it is hard and smooth; In the case of soft necklaces or carved jewelry with cutouts, it is best to soak them in silver jewelry cleaning solution. With these methods, you can wear beautiful silver jewelry to your heart's content.

The following is a little knowledge about silver jewelry, you can refer to it, I believe it will help you 0

Silver jewelry is one of the more aura jewelry, and the maintenance of silver jewelry is also very particular.

Attention should be paid to the following:

1. Avoid putting it together with hairspray, perfume, and skin care products;

2. Remove silver ornaments when washing, bathing, and doing rough work;

3. The best maintenance method for silver jewelry is to wear it every day, because the human body oil can make the silver produce a natural warm luster, which is the so-called "human raising";

4. Silver jewelry is easy to change the surface when it comes into contact with hot spring water or sulfide, so it should be avoided wearing it in hot spring areas;

5. When the silver is oxidized, it has a light brown color, and it can also be wiped directly with a silver cloth (the silver cloth contains silver maintenance ingredients, which cannot be washed, and the stains produced by wiping are silver, which can be used many times);

6 Silver ornaments should be kept tightly closed when not worn. In addition, due to the different oxidation resistance and luster durability of various silver jewelry, if the silver jewelry is seriously blackened, it is useless to just use a silver cloth, and you have to use silver washing water or take it to polish.

The following points should also be noted:

When wearing 925 sterling silver jewelry, do not wear other *** jewelry at the same time, so as to avoid collision, deformation or abrasion;

Avoid 925 sterling silver jewelry from contact with water vapor and chemicals, and avoid wearing it for swimming, especially when going to the sea;

After wearing 925 sterling silver jewelry every day, wipe it clean with a cotton cloth and put it in a jewelry box or bag to seal and preserve.

925 sterling silver jewelry has been oxidized and blackened, and can be brushed with a soft-bristled brush dipped in toothpaste; It can also be cleaned by hand soap or detergent; It really can't be cleaned before scrubbing with silver washing water; After washing, 925 sterling silver jewelry should be dried with a cotton cloth.

It should be silver, silver is like this, it will oxidize, you can brush it with a toothbrush with toothpaste, and it will turn white.

Silver jewelry will be blackened by air oxidation, contact with hot springs or strong acid solutions, and gold and silver jewelry containing K will still slowly expose the silver underneath to the air under the wear and tear of long-term wear. You can use a silver polishing cloth to wipe the smooth, carved or irregular surface of silver jewelry, and you can use a soft-bristled toothbrush with a little tooth powder or baking soda to gently scrub it, which is natural and cheap. After brushing, let the foam adhere to the silver jewelry for about a minute, then rinse it off with clean water and dry it with a soft cloth, and you will find that your beloved silver jewelry has returned to its bright original color.

Try not to use silver wash to clean silver jewelry, as it will erode the surface of the sterling silver, and although it will quickly return to its shine, it will also quickly turn yellow and black. And every time you use silver washing water, it is to corrode the silver jewelry again, for your beloved silver jewelry, or take some trouble to use the silver polishing cloth.

I think silver is a bit more likely. It's normal for silver to turn black. You buy a silver cloth or wash silver water to try it, ordinary water is not good. The main thing about this kind of thing is maintenance.

Silver jewelry maintenance knowledge:

Most consumers know that silver jewelry will turn black, but they don't know how to prevent it from turning black or what to do, which is the root of some consumers' reluctance to buy silver jewelry. Therefore, teaching how to maintain and remove oxides on the surface of silver jewelry and restore the luster of silver jewelry is a guarantee of consumer confidence. The main ones are to do the following:

Do not wear other *** jewelry at the same time when wearing silver jewelry to avoid collision deformation or abrasion. Avoid exposure to water vapor and chemicals, and avoid swimming while wearing it, especially when going to sea. After wearing silver jewelry every day, wipe it clean with a cotton cloth and put it in a jewelry box or bag to seal and preserve.

Silver jewelry has been oxidized and blackened, can be brushed with a soft brush dipped in toothpaste: can also be cleaned by hand soap or detergent: it is really impossible to deal with it before scrubbing with silver water:

After washing, the silver jewelry should be dried with a cotton cloth.

The best way to maintain silver jewelry is to wear it every day, because the body's oil will give the silver a warm and natural luster (although there are some exceptions, some people's sweat itself contains ingredients that make silver black). It is best to put it away when it is not usually worn, and it is best to pack it in an airtight bag to prevent the surface of the silver jewelry from oxidizing and blackening in contact with the air. When wearing, wipe the surface of the silver jewelry with a soft cloth every day to maintain the shine.

However, it is best to use a special silver polishing cloth. Daily cleaning method: squeeze a little toothpaste on the top of the silver, add some water, properly rub until a small white bubble, and then rinse with water to restore the brightness.

The blackening of silver jewelry is a normal natural phenomenon, and there is nothing strange about it.

Silver, chemical name AG, it is a relatively active metal, sulfur and oxides in the air and other natural media have a certain corrosive effect on silver, because the oxidized silver oxide and silver sulfide are black, therefore, silver jewelry in the placement or wear for a period of time, there will be some tiny black spots (silver oxide) or black film (silver sulfide film), for a long time, with the diffusion of black spots and black film, silver jewelry will slowly change color, serious and even become black.

As the old saying goes: copper turns green, silver turns black, and real gold never changes color. Silver blackening is a normal phenomenon and has nothing to do with purity, in fact, the lower the purity, the less likely it is to turn black, it may be that you have accidentally touched something.

Actually, if you've read some jewelry books, it's a chemical reaction. Tell the story of the ancient emperor who used silver chopsticks to eat, because of the characteristics of silver, a metal, it will turn black when it encounters toxic substances. In modern terms, silver jewelry can suck out toxic substances from your body (which of course is not important for your health), and it is precisely because silver jewelry constantly absorbs toxic substances from the air and your sweat that there are several other answers, which are really just some superficial phenomena.

It may be that you didn't wash it off with soap when you took it in the shower, so it's best to take it off first when you take a shower.

Silver is oxidized and can be soaked in cola and then wiped with a dry cloth.

Toxic substances, in ancient times, there was a saying that silver needles tested poison.

The surface of silver products is very easy to be oxidized by the air, and once oxide, it becomes black and thin, and a thin layer appears.

Silver oxidizes naturally in the air, which is normal.

Metallic silver is exposed to the air for a long time, forming silver oxide, which will return to its original luster when rubbed with toothpaste or the like.

It is a good thing to bring blackening, absorb the toxins in your body, and if it is not black, it means that the composition of silver is not high.

The better the body, the brighter and whiter it is, and if there is a problem with the body, it will become dark and discolored.

I heard that the better the body, the brighter the silver is.

When the silver bracelet turns black, first see if it can be ruled out as having come into contact with substances containing sulfur, some soaps and facial cleansers contain a small amount of sulfur.

Advice: If you can be sure that you have not been exposed to any substances containing sulfur, it may be caused by wind and dampness in the body, which will gradually get better, so you don't have to worry if you don't have any other uncomfortable conditions.

If the silver jewelry is not processed and collected after wearing it, it is very likely that the silver jewelry will turn black. At this time, the jewelry should be thoroughly cleaned, and then the tissue paper or cotton cloth should be dipped in a little silver milk, and the black oxide on the surface of the silver jewelry should be wiped off, and then the original brightness of the jewelry should be restored with a silver cloth. After that, you must remember to do a good job of daily maintenance to avoid the silver jewelry from turning black again, because it is difficult to wipe white after the silver jewelry has been blackened many times.

Please note that keeping your silver jewelry dry is key in your daily wear. Do not swim or approach hot springs and sea water while wearing them. Wipe the surface with a cotton cloth or tissue paper after each wear to remove moisture and dirt, and store it in a sealed bag to avoid contact with the air.

At the same time, do not wear other *** jewelry when wearing silver jewelry to avoid collision deformation or abrasion.

There are many ways to clean and maintain silver jewelry, in addition to using toothpaste to achieve the cleaning effect, wearing it every day is the best way to maintain silver jewelry. When worn, the oil produced by the human body adheres to the surface of the jewelry, which can avoid direct contact with the air and reduce the signs of blackening and yellowing.

Oxidized, go to the store to wash it. This will happen if you don't bring it for a long time.

**Buy** should be washed. If it is not possible, please refer to the following practice:

1. Coca-Cola soaking, soaking time is 12 hours.

2. You can apply lipstick to the cloth and then wipe the silver, and finally rinse with water.

3. It can be scrubbed with acetic acid.

4. It can be soaked with overnight tea.

5. You can wipe it with a silver cloth.

6. You can soak it in silver washing water for one to two minutes.

7. You can use the correction liquid to apply to the silver jewelry, and wipe the silver jewelry with a cloth before the correction fluid is dry.

8. You can use toothpaste and toothbrush to scrub.

Also, my grandmother said that if the silver is worn on the body and worn black, then be careful that the part you wear is pathological) - Jo Lanci

Silver jewelry is prone to discoloration, so it is better to buy gold.