Hello fellow veterans, I believe many people don’t know much about the blackening of silver. Therefore, today I will share with you about the blackening of silver and the natural change of silver. I hope that the knowledge about black methods can help everyone and solve some of your confusions. Let’s take a look below!
Contents of this article
- Does sulfuric acid turn silver black
- Why does silver turn black and cannot be washed off
- Why does silver jewelry change color when worn? Black
- Is the silver that turns black when burned is real silver
- How to naturally turn silver black
- How to clean silver that turns black due to oxidation
1. Will sulfuric acid turn silver black?
1. No, silver does not turn black when it encounters sulfuric acid. It is caused by oxidation. Dilute sulfuric acid does not react with silver. Generally, it will only become brighter when encountering weak sulfuric acid. If it is jewelry, you can soak it in vinegar and then scrub it vigorously with a soft cloth to make it look as bright as new. Never soak it in concentrated sulfuric acid, otherwise it will disappear without a trace.
2. To restore the luster of silver jewelry, you can use the following methods:
3. (1) Wipe with cotton dipped in white vinegar. The black silver sulfide will dissolve in the ester acid and the silver jewelry will appear shiny again.
4. (2) Wipe with alcohol or sodium carbonate, the effect is also very good.
5. (3) First clean the surface of the ornaments with detergent, and then use sodium thiosulfate solution (add 20 grams of sodium thiosulfate to 100 grams of water) Preparation), then rinse with clean water.
6. (4) Use 1 part of tartaric acid, 1 part of alum and 10 parts of table salt, mix and heat to boiling, immerse the jewelry; take it out after 10 minutes, use water Wash and pat dry.
7. (5) Wash it with ammonia, or squeeze toothpaste onto a flannel and wipe it, which can also restore its original luster.
2. Why does silver turn black and cannot be washed off?
It turns black if you wear it too much. It may also be due to excessive sweating, which varies from person to person. There are some external factors that will affect it, such as smoking all year round, having the habit of wearing perfume and heavy makeup, or frequently using sulfur soap and enjoying hot spring baths, etc. These factors may cause silver to turn black. In fact, the blackening of silver does not necessarily mean poor health. The darker the silver is, the darker the silver is. It has nothing to do with the health of the body. Wearing silver jewelry can absorb toxins from the body. This statement is also unreliable.
3. Why does silver jewelry turn black when worn?
1. Silver jewelry will turn black when worn because the silver surface is oxidized!
2. The blackening of silver is mainly related to frequent sweating and application of cosmetics!
3. Silver is an unstable metal, especially when it is in contact with air for a long time, it will oxidize with the silver on the surface of the silver jewelry. effect, causing the silver to turn black and lose its original luster.
4. If silver turns black when burned, is it real silver?
1. You can use fire to identify the authenticity of silver. Real silver will not change after being burned by fire, while fake silver will turn black after being burned by fire. You can also drop hydrochloric acid on it. There will be no change after dropping hydrochloric acid on real silver. However, after dropping hydrochloric acid on fake silver, the surface will turn green or black.
2. You can also look at the hardness. Real silver is soft and will be bent with a slight bend. Fake silver is hard and difficult to bend.
5. How to naturally turn silver black
1. (1 ) Directly wipe with cotton or a cotton swab dipped in white vinegar. The black silver oxide will be dissolved in the ester acid, and the silver jewelry will be shiny again.
2. (2) Wipe with alcohol or sodium carbonate mixed solution and then blot dry with cloth.
3. (3) First wash the surface of the jewelry with dish soap, then fully dilute it with sodium thiosulfate solution, then wash the silverware, and then wash it with clean water. Just clean it.
4. (4) Mix alum and table salt thoroughly in a ratio of one to ten, heat the mixture to boiling, and then immerse the jewelry; take it out after 10 minutes, wash it with water and wipe it dry.
5. (5) Cleaning with ammonia, or squeezing toothpaste onto a flannel, and then wiping with the flannel can also restore its metallic luster. Pay attention to the maintenance of jewelry. After seeing water, wipe it with a dry cloth or paper cloth. Silver jewelry that has not been used for a long time should be placed in a dry and sealed environment.
6. How to clean oxidized and blackened silver
There are three ways to deal with oxidized and blackened silver: 1. Soak in cola. The carbonic acid in cola can Remove the black compounds on the surface of the silver jewelry; 2. Soak in white vinegar. The acetic acid in the white vinegar can dissolve the black compounds on the surface of the silver jewelry and restore its luster; 3. Clean with toothpaste, use a soft toothbrush and toothpaste to clean the silver jewelry.
Pure silver oxidizes to black. You can soak the silver jewelry in cola. Coke contains carbonic acid. Soaking the blackened sterling silver jewelry in cola can make the carbonic acid react with the surface of the silver jewelry. The black compound reacts to restore the color of silver jewelry. When sterling silver oxidizes and turns black, it can also be soaked in white vinegar. Soaking sterling silver jewelry in white vinegar can also allow the acetic acid to react with the black compounds on the surface of the silver jewelry, making the silver jewelry as clean as new.
You can also use toothpaste to clean it. Wipe sterling silver jewelry. Squeeze a small amount of toothpaste on the surface of the silver jewelry and gently scrub it with a soft toothbrush. This can also make the black color on the surface of the silver jewelry disappear. Be careful to choose toothpaste that does not contain particles.
Okay, this article ends here. If it can help you, please pay attention to this site!
