Why do silver bracelets change color?
Why do silver bracelets change color? Jewelry made of silver is very common. There are many reasons why the silver bracelet you are wearing suddenly turns black. Generally, It is all due to the oxidation reaction with certain ions in the air. The following is an analysis of why silver bracelets change color. Why silver bracelets change color 1
Reasons why silver bracelets change color
Important factors It is a chemical reaction between silver ions and sulfur ions. The result of the reaction is silver sulfide produced on the silver surface. Because silver sulfide is gray-black, as the amount of silver sulfide increases, the color of the silver surface gradually changes from white to yellow to gray and finally to gray. black.
This chemical change can occur in extremely small amounts. When silver encounters hydrogen sulfide gas or sulfide ions, which is one part per trillion to tens of trillions in the air, this will happen. a chemical reaction.
Human sweat also contains sulfur. When it comes into contact with silver products, it will cause silver to change color. Especially the hydrogen sulfide produced by sewage and garbage discharge in urban air is even more alarming. Therefore, silver changes color. Not surprising. Just wash it with toothpaste, especially fluoride toothpaste, which is more effective.
Rules for wearing silver jewelry
1. Business attire is suitable for matching simple and slim sterling silver necklaces.
2. Casual wear is suitable for matching sterling silver rings with unique designs and exaggerated shapes.
3. A silver bracelet with a small bell is perfect for a cute outfit.
4. Silver ornaments inlaid with colored artificial gemstones are suitable for young girls to wear.
5. Tibetan silver has a strong personality and should not be paired with professional attire to avoid giving people an unprofessional and capable feeling.
6. Silver jewelry should not be worn mixed with gold jewelry, but silver jewelry with different styles can be worn together to present a rich texture.
7. When attending luxurious occasions or wearing gorgeous clothes, you should choose silver jewelry with precious jewelry and diamonds.
8. After silver jewelry becomes old and black, it does not have to be cleaned before you can continue to wear it. The nostalgic taste is also great.
9. Silver jewelry is a fashionable thing, so you should pay attention to changing the style you wear frequently.
10. The popular matching method presented this year is to match two or more types of silver jewelry with each other to create a unique feeling.
Identification of silver jewelry
Look at the mark
Silver jewelry should generally be marked with the English abbreviation of silver ("S" or "Sterling"). The mark of standard silver is S925, or 9.25 or 925. The mark of Pure Silver is S990. But there are also many countries that do not print marks on silver jewelry. Or the 9.25 or 925 mark. There are also stamps of Thousand Pure Silver or S999.
Check the color
Silver jewelry is mostly a slightly yellowish silvery white with a soft metallic luster. Because it is easy to oxidize, the color will turn into a dark yellowish white over time.
Weighing the weight
The density of silver is 10.53 grams/cubic centimeter. It is smaller than platinum and gold, and has a smooth feel when weighed by hand. The steel needle can draw marks and can also be bent. This method can be used to distinguish German silver jewelry from platinum, K platinum or imitation silver.
Check the hardness
The hardness of silver is lower than that of copper, but larger than that of lead and tin. You can use a pin to scratch an inconspicuous part of the jewelry to test it. If the needle slips, it will be difficult to leave traces on the surface. , it can be judged to be copper jewelry; if it is made of lead or tin, the traces are obvious and prominent; if the traces are not obvious on the actual object, it can be preliminarily judged to be silver jewelry.
Listen to the rhyme
Sterling silver jewelry has a sound and no elasticity. The lower the quality, the lower the sound, and the sharper the sound, the higher and rhymed it is; if it is made of copper, the sound will be higher and sharper, and the rhyme will be rapid and short; if it is made of lead or tin, the sound will be dull and short. , no elasticity.
Maintenance of silver jewelry
1. Silver jewelry should be removed when washing, bathing, and doing rough work.
2. Silver jewelry should be kept airtight when not worn, and avoid being placed together with hairspray, perfume, and skin care products.
3. Silver jewelry that comes into contact with hot spring water or sulfides can easily cause surface changes, so you should avoid wearing it in hot spring areas.
4. Silver turns light brown when oxidized, and can also be wiped directly with a silver wiping cloth.
5. The best maintenance method for silver jewelry is to wear it every day, because human body oil can make silver produce a natural and moist luster, which is the so-called "human maintenance".
6. Special attention should be paid to the silver jewelry inlaid with stones, and try not to get wet, because there will be gaps at the junction of the inlays and the stones will easily fall off when exposed to water. Why does silver bracelet change color 2
First of all, what is the reason why silver bracelet turns black? From a scientific point of view, although silver is an inactive metal element, it is generally not Oxidation will occur. If it is not worn or used and the sealing condition is intact, it can always remain as smooth as new. But why do some people find that silver bracelets turn black as soon as they wear them?
As a chemical element, although silver is relatively lazy, it does not mean that it will not react with any substance in nature. . The most common ones are reactions with hydrogen sulfide, elemental sulfur, and certain poisonous gases in the air. If silverware is exposed to the air for a long time, it will inevitably be contaminated with some substances by chance, causing a chemical reaction, and eventually the silverware will turn black.
Silver bracelets are generally worn on people's wrists. They are in contact with people's skin, and people also wear silver bracelets to do other things. If you happen to encounter some chemicals that can react with silverware, it is understandable that the silver bracelet will turn black.
From the perspective of Feng Shui and folk customs, when a silver bracelet is worn on the human body, waste will be excreted from the human body, and the silver bracelet will also be contaminated with sweat, etc. of excrement. If a person's body is weak, the excretion will increase, and the silver bracelet will turn black when worn. Moreover, Feng Shui believes that when a person's fortune is poor, body functions will also be affected. Therefore, a blackened silver bracelet can also indirectly prove that a person's physical condition is not good and his fortune is not good in the near future.
Secondly, is there any way to deal with the blackening of silver bracelets? From a practical point of view, the way to avoid blackening of silver bracelets is to avoid wearing silver bracelets and other jewelry at the same time to avoid collisions or The second is to keep the silver bracelet dry and not always soaked in water, especially warm water and salt water, which will accelerate the oxidation of the silver bracelet.
If the silver bracelet turns black, you can choose to remove the moisture and dirt on the surface of the silver bracelet and put it in a clean and sealed plastic bag to avoid contact with the air. Leave it for a period of time, then use toothpaste and water to clean the silver bracelet a little bit, and then simply wipe it, then the silver bracelet can restore its previous glory. Why do silver bracelets change color 3
What to do if a silver bracelet turns yellow
1. Professional silver polishing cloth
It is a special and professional cloth. Then it will have silver powder on it so it can be wiped clean.
2. Toothpaste
To use toothpaste, apply the toothpaste directly on the silver jewelry and wipe it. Then add a little water to make foam. If there are gaps, use a toothbrush to scrub them. , to prevent foam from entering the seam.
3. Silver washing water
For silver washing water, you can use the soaking method (except for the distressing process) or the wiping method (except for the platinum plating process and the inlay process) to remove the silver. Put the jewelry into the silver-washing water for about three minutes (if the oxidation is particularly serious, you can leave it for a longer time), take it out and wash it repeatedly, wash it out with a lot of water, put it into an alkaline solution (such as washing powder water) and wash it, and finally use Just rinse with clean water.
How to solve the yellowing of silver bracelets
1. In addition to toothpaste, you can also use tooth cleaning powder to clean discolored silver bracelets, which can also have a cleaning effect.
2. Take a container, pour an appropriate amount of cola into it, and then put the silver bracelet to be processed. After soaking, wipe it with a soft cloth.
3. Squeeze the toothpaste onto a soft cloth, and then wipe the silver bracelet with the soft cloth. After wiping it several times, rinse it with clean water, then dry it and store it.
4. If the silver bracelet turns yellow, you can directly use a silver polishing cloth to wipe the surface. By wiping, the oxides on the surface can be wiped off and the original luster can be restored. The silver polishing cloth cannot be washed, and cleaning it will affect the use effect.
The reason why silver bracelets turn yellow
Everyone has studied chemistry in junior high school and high school, and also studied the periodic table of elements. Only one substance is silver. On the periodic table of elements The silver element is the essence of silver bracelets. Silver is a very unstable material and easily reacts with oxygen in the air. Once it stays in the air for too long, it will be oxidized, and the result is that the silver bracelet will turn yellow. This is the real reason why the silver bracelet turns yellow.
Is it normal for a silver bracelet to turn yellow?
Is it normal? Yellowing of silver bracelets is a phenomenon caused by slight oxidation of the surface, which is related to physical constitution, wearing environment, etc. Metals will oxidize in the air. Water, sulfur and chlorine in the air are the culprits that accelerate its oxidation. Sulfur is the main factor that makes silver black. Silver will react strongly when it comes into contact with sulfur-containing substances. This is why silver jewelry that has been washed with sulfur soap or soaked in hot springs will turn black. Generally, if silver jewelry turns yellow, it can be restored to its original silvery whiteness by simply treating it with a silver polishing cloth or silver washing water.