What is the reason why the silver jewelry worn by some people turns black?

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 produces different results, the acid is easy to black, the non-acid is not easy to black, and even some people with strong oil secretion will bring their silver jewelry to shine. Most of the silver jewelry is plated (except for a small part of the silver jewelry), so please do not use the silver cloth easily, but even if there is plating, you need to take good care, so please try not to wear silver plated jewelry when you sweat a lot. Silver blackening is a normal natural phenomenon, because the sulfur and oxides in the air and other natural media have a certain corrosive effect on silver, after wearing for a period of time, there will be some tiny spots (silver sulfide film), over time will spread into a piece, or even turn black.

Therefore, at present, silver jewelry has some discoloration due to oxidation. "It is normal for silver jewelry to turn black, but if you pay attention to daily maintenance, it is completely possible to make silver jewelry last for a long time".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 of the soil method:

Squeeze a little toothpaste on top of the silver jewelry, add some water, rub it properly until it has small white bubbles, and then rinse it with water to restore the brightness.

The blackening of silver jewelry is due to the chemical reaction of silver with sulfur in the air to form black silver sulfide. As long as it is well maintained, the silver jewelry will not be black, but it is ......Maintenance is also learned. Hehe: Are you looking to buy silver jewelry?

Oh, and ......Silver jewelry must not come into contact with perfumes, incense powders, balms, sulfur soaps, sweat and acidic bleaching gases, etc. Otherwise, it will turn black

.= It is the oxidation of the silver, you can apply nail polish to prevent oxidation, and the pH of **.

If the silver jewelry suddenly turns black, it may be that the silver jewelry has touched the sulfur element and a chemical reaction has occurred, causing the silver jewelry to suddenly turn black. It may also be that when wearing silver jewelry, it comes into contact with strong acids or strong alkalis, which has a chemical reaction with the silver jewelry and makes the silver jewelry black.

1. The silver jewelry worn by sulfur suddenly cracks and turns black, which may be related to sulfur. When silver jewelry encounters sulfur, it will undergo a chemical reaction, which will cause the silver jewelry to suddenly become the source silver black. The sweat secreted by the human body contains sulfur substances, and if you wear silver jewelry for a long time, the silver jewelry will be contaminated with sweat, which will change the color of the silver jewelry.

2. When wearing silver jewelry with acid and alkali, if you are often exposed to some strong acids or strong alkali substances, it will easily cause chemical reactions in silver jewelry and make silver jewelry black. Therefore, silver jewelry should not come into contact with preserved eggs, gas and other substances, otherwise it will discolorate the silver jewelry.

3. The nature of silver oxide is relatively lively, if the silver jewelry is in contact with the air for a long time, the silver jewelry will be oxidized, resulting in the blackening of the silver jewelry. Therefore, when wearing silver jewelry, it is necessary to pay attention to cleaning the silver jewelry regularly.

Apply a layer to the jewelryNail polishIt can prevent fading, but nail polish has a certain toxicity, and nail polish is not recommended for intimate jewelry.

The role of jewelry in life is the most important thing, but because some jewelry is very easy to oxidize, especially silver jewelry, so applying a layer of transparent nail polish can still slow down the oxidation reaction.

It can play a certain anti-discoloration effect.

It is normal for silver jewelry to turn black, because the sulfur and oxides in the air and other natural media have a certain corrosive effect on silver, and after wearing it for a period of time, there will be some tiny spots (silver sulfide.

membrane). Over time, it will spread into a piece or even turn black, even if the surface of the jewelry is plated with a protective film, if you don't pay attention to it for a long time, there will still be oxidation.

Methods to prevent oxidation of ordinary jewelry.

1. When you don't wear it, it's best to put it in a sealed bag to prevent the surface of the silver from oxidizing and turning black in contact with air.

2. When wearing silver jewelry, please do not wear other *** jewelry to avoid collision, deformation or scratches.

3. Keep the silverware dry. Don't wear it to swim. Stay away from hot springs and sea water.

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 produces different results, the acid is easy to black, the non-acid is not easy to black, and even some people with strong oil secretion will bring their silver jewelry to shine.

Some people wear silver jewelry to become whiter and whiter, and some wear it more and more black, which cannot be explained by Western medicine, and Chinese medicine believes that the latter has wind in the body, and the blackening is a manifestation of the detoxification function of silver.

Another, more scientific explanation is:

On the one hand, it has become very unstable due to its own energy increase. 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 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.

Sterling silver jewelry is easy to oxidize, and sulfur oxidation yellows, and then turns black.

Generally speaking, the human body's ** secretions have a maintenance effect on silver jewelry, most of them are worn more and more bright, only a few people, because of personal physique, the more they wear the blacker, not necessarily bad health. When silver hits sulfur, it turns black, which can be proved by rubbing silver products with boiled egg yolks with more sulfur content. Some people have more sulfur in their sweat, and silverware is easy to turn black, so it is not suitable to wear silverware with this kind of physique.

Blackened silverware can be wiped off with toothpaste applied to a cloth.

Long-term exposure to evaporated moisture and oxygen in the air will form silver oxide on the surface of the silver jewelry.