Will a thousand feet of silver turn black after a long time?

Because the sulfur and oxides in the air and other natural media have a certain corrosive effect on silver, after wearing it for a period of time, some tiny spots (silver sulfide film) will appear, and over time it will spread into flakes and even turn black.

Silver is a chemical element, the chemical symbol AG (from the Latin Argentum), atomic number 47, is a silvery-white transition metal. Silver exists in very small quantities in nature in a free elemental state, mainly in the form of silver-containing compound ores. The chemical properties of silver are stable, the activity is low, the most expensive, the thermal and electrical conductivity is very good, it is not easy to be corroded by chemicals, it is soft and malleable.

Its reflectivity is extremely high, up to more than 99%.

If you don't wear silver for a long time, this blackened thing will burn naturally, and if you oxidize it and become black, you have to bring it more, and you can polish this black thing.

This is a reaction with oxygen in the air, that is, it is oxidized. It is normal for silver to be oxidized and blackened, and it can be brushed with toothpaste to turn into its original color.

Silver is prone to oxidation, and when it oxidizes in the air, it turns black. Just find a soft cloth and wipe it off. If you don't usually wear it, you can wrap it in a cloth and put it in a box.

Let's start with my experience. I am a small seller of X-treasure silver jewelry, some styles can not be sold for various reasons, and the inventory should be put for a year or two, and there are some experiences in the preservation of silver jewelry. Silver jewelry, in addition to looking at the quality and style of sterling silver, because sterling silver will oxidize and change color when it comes into contact with air, so the most important thing when it comes to storage and wearing life is the quality of silver plating.

You haven't brought it for a year, and it's still black. One may be that the coating is not done, or the plating is not done well, bumps and damages; In addition, it turns black, and the oxidative discoloration of sterling silver is generally light yellow or light gray, and the surface will only turn black when it touches blood or chemicals such as cosmetics, shampoo, and shower gel. There is also a possibility that this one is just silver-plated, and it is made of copper-iron alloy and the like, and after oxidation, it is rust.

To turn black, first wipe it with a silver cloth, and wipe it with some toothpaste brush that can't be wiped off. Be cautious with silver rubbing rods and silver washing water. Silver jewelry with damaged plating is easy to oxidize and discolor again, so if you don't bring it, seal it and store it, and wipe it with a silver cloth every once in a while to maintain it.

Silver is an active metal that easily reacts with sulfur in the air, turning silver black.

Therefore, it should not be worn in places where chemical gases are concentrated. Sulfur soap must be dried immediately after contact.

In addition, chloride in sweat also has an effect on silver. And silver and gold cannot be worn together, which will cause the silver to turn yellow. Of course, even if you don't wear it at the same time, after a long time, the silver jewelry will still oxidize and change color, whether it is plated or not!

Original color, polished surface.

The easiest way is to wipe it with a silver cloth and you're good to go. If there are gaps on the non-polished surface, you can wash it with silver washing water. The surface has been plated, wipe it with a soft cloth, and avoid contact with chemical substances (such as bath liquids, soaps, chemical reagents, perfumes, 84 disinfectants, etc.) because the electroplating layer is very thin, and the wiping of rough cloth and the damage of chemical substances will affect the brightness of the surface.

When silver comes into contact with sulfides in the air, such as the smell of rotten eggs that contain hydrogen sulfide, black silver sulfide forms on the surface of the silverware. The sum of it is revealed.

The blackening of silver jewellery is mainly related to oxidation.

It's not the toxins in the human body that make the silver jewelry black, but the oxidation reaction of the silver jewelry itself!

Silver is a perfect material for jewelry, as it is not only chemically stable, but also highly resistant to corrosion. However, silver has a fatal disadvantage, that is, it is easy to have a chemical reaction with sulfur ions in the air, which will lead to the formation of sulfur oxide on the surface of silver, which will affect its color and luster. The blackened substance on its surface is actually silver sulfide!

Any metal product, due to the presence of oxygen in the air, will be oxidized, including**, thanks to netizens.

In fact, when the Son of Man comes into contact with things like the wind, including the air, it will oxidize and oxidize, and it will turn into silver oxide, and it will turn black.

It is said that if you wear sterling silver, if you have a problem with your body, the sterling silver will turn black.

Exposure to sunlight and prolonged exposure to oxygen, sweat and salt on your body will cause the silver to oxidize, and the oxidation will turn black, but if you wipe the surface with a silver cloth and wipe off the oxidized part, it will turn silver again.

Because of long-term contact with **, sterling silver will turn black after wearing it for a long time.

Because silver jewelry is prone to oxidation and stains with sweat, it will turn black.

Because it oxidizes with oxygen.

1. Polluted oxidation.

Improper wearing or storage of silver jewellery, exposure to strong oxidizing environment, or contamination with strong oxides can lead to oxidation of the surface of silverware. If the silver bracelet is not worn often, it does not matter if you take it off, and if you put it casually, the silver jewelry will also combine with the sulfur dioxide in the air to undergo a natural oxidation reaction and turn black.

2. Endocrine structural reasons.

Because everyone's endocrine structure is different, some people's sweat contains more acid, some people have less, and some people's ammonia content is higher, so wearing silver jewelry has different results, the sour ones are easy to black, and the non-sour ones are not easy to black, and even some people with strong oil secretion will bring their silver jewelry to shine.

3. Physical factors.

Due to the continuous metabolism of the human body, the toxins are also eliminated, so if the body excretes toxins and encounters silver, then the silver will turn black. This also reflects that your health may not be well, and you should pay attention to your own examination.

There are three reasons why silver jewelry can turn black after a long time.

First, it is oxidized, and the silver jewelry is in contact with oxygen, which will produce an oxidation reaction.

The second is contact with **, sweat will react with silver jewelry.

The third is that if the silver jewelry comes into contact with corrosive things, it will also turn black.

It is normal for silver jewelry to turn black. Because silver itself has the effect of sterilization and disinfection, cold and moisture removal. If you are not feeling well, the silver jewelry will turn black.

Because sterling silver is worn for a long time, the molecules in it will react with the oxygen in the air, and after oxidation, it will turn black.

Because it causes prolonged exposure, it will oxidize on the outside, and silver oxide is black.

Whether it is gold or silver, oxidation is unavoidable by us, and there will definitely be this problem more or less, but this is just a normal change, and it has little to do with the health of the human body. Silver chemicals are active, and when sulfur ions collide in the air, insoluble silver salts are formed.

When a chemical change occurs, silver reacts with a large number of sulfur ions in very small quantities to create compounds. Over time, the compound developed a black silver film on the surface of the silver, which at first was just tiny dots, and gradually developed into flaky hair, in fact, silver scale, which began to be white, then evolved into yellow, gray, and black.

In addition, people sweat every day, and the sulfur, ammonia and other substances in the sweat will cause oxidation and changes on the surface of the silver, and there will be no luster after a long time, which has nothing to do with the toxins that people say about sucking out the body, these are normal.

When you get older, some people will think that it is more tacky to wear ** jewelry and pearl jewelry, and the silver is full and brighter, and if you don't take it for a while, it will turn black, and some people will say that it is because it is poisonous. And some people wear silver jewelry every day and do not take it off, and there will be no blackening. If you want the silver not to turn black, you mainly rely on the usual maintenance.

Oxidation, after silver comes into contact with oxygen, black silver oxide will be generated on its surface, affecting the luster and texture of silver; Sweat, the sweat secreted by the human body will chemically react with silver, resulting in blackening; Stains, silver wears for a long time, and the stains on the surface accumulate more and more, resulting in the blackening of the silver surface.

1.Oxidation. Why does silver turn black?

The blackening of silver is the number one cause of oxidation. Silver is active in nature. If it comes into contact with oxygen, it is prone to oxidation reactions, resulting in black silver oxide on the surface of silver, affecting the luster and texture of silver.

2.Anxious. Why does silver turn black?

The darkening of the silver may be the cause of sweat contamination. The sweat secreted by the human body will have a chemical reaction with silver, resulting in blackening, especially when the amount of sweat is large, which will directly cause the silver to suddenly turn black and make the silver lose its luster.

3.Defile. Why does silver turn black?

The blackening of the silver may be the cause of the stain. After wearing silver jewelry for a long time, the stains on the surface accumulate more and more, resulting in the blackening of the surface of the silver jewelry due to excessive stain accumulation, which needs to be cleaned before recovery.

It is not recommended to wear 925 silver because 925 silver is easy to turn yellow and black. Oxidation in the air can cause discoloration. Silver discoloration can be wiped with a soft cloth dipped in toothpaste, but not toothpaste with abrasive particles to avoid scratches.

925 silver is added with copper alloy components, which increases the hardness and is more suitable for making flower-shaped jewelry. Finished silver jewelry is usually electroplated and polished, so it has stronger oxidation resistance than 999 and 990, but silver jewelry needs to be maintained, and it cannot be worn arbitrarily.

Precautions for silver jewelry.

Do not wear other *** at the same time when wearing craft silver jewelry, so as not to collide with each other and deform or bruise.

Try to avoid contact with water vapor and other corrosive chemicals, and it is best not to swim while wearing it, especially when going out in the sea.

If there are friction scratches on the surface of the product, it is easy to accelerate the oxidation of silver, so when the surface of the product is oxidized to light brown color, or corroded by chloride (such as swimming pool water), please treat it in time.

It is normal for silver jewelry to appear black after wearing it for a long time, because silver can react with a small amount of sulfur in the environment or human sweat to form silver sulfide, and the color of this product is black.

In addition, when silver is oxidized, black silver oxide is also formed. Therefore, there is no direct relationship between the blackening of the silver bracelet after wearing it and whether there is a problem with the body, and the statement that the blackening of the silver bracelet is a physical problem lacks scientific basis.

When there is any discomfort in the body, the patient needs to go to a regular hospital in time for examination under the guidance of a professional doctor, and carry out active symptomatic treatment after clarification, so as to ensure their health and safety to the greatest extent.

Because the sulfur and oxides in the air and other natural media have a certain corrosive effect on silver. After wearing it for a while, some tiny spots (silver sulfide film) will appear, and over time they will spread into patches or even turn black.

Therefore, at present, silver jewelry has some discoloration due to oxidation, in addition, the material of silver jewelry will also affect the degree of blackening of silver jewelry. If the silver jewelry has oxidized and turned black, it can be cleaned with a soft brush dipped in toothpaste, or it can be cleaned by hand soap or detergent.

Silver is a relatively unstable metal, if the sterling silver jewelry is not processed and collected after wearing, it is very likely to be in contact with the air for a long time, resulting in the surface and air oxidation reaction and blackening.

After the silver bracelet turns black, you can try the following methods to white:

1. If you find that the sterling silver jewelry has signs of turning yellow and black, the easiest way is to use toothpaste and some water to gently wash the surface. Or use a small jewelry brush to clean the fine seams of silver jewelry, and then gently wipe its surface with a silver cloth, and you can immediately restore the original beauty of the decoration.

2. You can buy a special silver cloth to wash white. Silver paper is a special cloth with silver powder on it, which can be wiped clean by a light wipe. The silver polishing cloth contains silver maintenance ingredients and should not be washed.

3. Use a jewelry brush to clean the fine seams of the jewelry, then drop a drop of silver polishing milk on the tissue paper, wipe off the black oxide on the surface of the silver jewelry, and then use a silver polishing cloth to restore the original brightness of the jewelry. After that, you should remember to do a good job of daily general maintenance to avoid the silver jewelry from turning black again.

4. Sterling silver jewelry is seriously yellowed, if you use silver washing water, but the soaking time should not be too long, generally a few seconds, immediately after taking it out with clean water, and then blot it with facial paper. If the use of silver polishing cloth can restore about eighty percent of the silver white condition, there is no need to use silver polishing milk and silver washing water, because these products have a certain corrosiveness, silver jewelry after using these products, will be more and more easy to turn yellow.

**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:

AG2+H2SO2=2AG2S ( Black Product ) + 2H2O

The result of the reaction 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 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.