Demystifying the roots of silver jewelry, so that you will wear silverware more

Since the birth of human civilization, gold and silver jewelry has been almost a symbol of wealth and status.

Because of the high value of gold, the popularity of silverware is relatively high. Although silverware does not seem to have characteristics in terms of color, the reflectivity of silver to visible light is still quite high compared to other metals. More than 90%, so "Silver" is not an exaggeration.

The root of "silver can detect poison"

At the latest, during the Song Dynasty, the ancient Chinese had generally learned to use silver needles to search for poison. This should also be thanks to the then-time forensic doctor Song Ci. He clearly recorded the practice cases of silver needle autopsy in the Collection of Washings. The principle of black needles and arsenic blackening reveals the cause of death.

Perhaps it is the popularity of this method by the people. Many people have therefore remembered the trick of silver poisoning, but how effective this method is, but it is revealed by modern chemistry.

Silver ornaments also slowly turn black in the air because, although silver is chemically stable, it is slowly oxidized by oxygen to form black silver oxide. If the content of sulfide in the air is high in the environment, the silver will become blacker at a faster rate due to the stronger affinity of silver and sulfur. This simple phenomenon is also the principle of silverware poisoning.

The chemical composition of arsenic is arsenic trioxide. Traditionally, the method of producing arsenic is made from sulphide sulfide. Due to limited purification technology, it contains more or less sulphide. After the silver needle is contacted, dark spots will appear. Of course, the possibility of misjudgment is not small. After all, during the autopsy, the sulfides produced in the body will also cause interference.

In fact, such interference is often encountered nowadays. Many life experts have reminded that wearing silver jewelry, if the silver jewelry turns black, it proves that the body is detoxifying.

However, as mentioned above, it is normal to have some sulfides in the body secretions, which are in contact with silverware for a long time, which causes them to turn black. Not to mention these chemistry principles, the so-called "detoxification", even if there is such a process, in fact, there is no direct relationship with the silverware test, because in the practice, the use of silver needle test is only for ancient times The arsenic is useful. Therefore, it is not absolute to use silverware to judge whether your body is "detoxifying".

Silver can not be poisoned but can be disinfected

Although it is impossible to judge "detoxification" or not, silverware can be disinfected but it is true, but the poison here refers to some microorganisms rather than toxic chemicals.

According to the experiment, when the concentration of silver ions is 0.1ppm, it can cause lethal damage to various bacteria and viruses. This is because, as a heavy metal, silver ions interfere with the DNA replication process of microorganisms and can also inactivate proteins. Therefore, due to the cyclic action, the sterilization and detoxification effect of silver ions is excellent.

More importantly, however, the heavy metal of silver is very friendly to humans. In our body, it is tightly bound with a lot of sulfur proteins. It is relatively easy to metabolize and does not look like heavy metals such as lead and mercury. It has a significant impact on human cells. In other words, silver ions are still very clear about the relationship between friends and foes.

Silver jewelry has been black for a long time, what should I do?

In the past, this problem was not really solved. There are few kinds of common metals that are more resistant to corrosion than silver. It is even rarer to have high reflectivity like silver. So in order to overcome this shortcoming of silver, the most common treatment method is to make silver alloy. Therefore, the most common silver ornaments on the market are 92.5% silver (ie 925 silver), which is relatively not easy to blacken. After being processed into an alloy, the hardness of the silverware is also effectively improved.

There is a way to clean the silver, which allows us to enjoy the beauty of silver, just need an aluminum container and a little salt water. Since the binding strength of silver sulfide to the substrate is relatively strong, the most appropriate method is to reduce the silver sulfide, and the degree of loss of silver is also reduced, and aluminum is an excellent reducing agent. Nowadays, aluminum pans are not very common, but the cans are all over the place, cut open, peeled off the inner coating, and then tightly attached to the silverware, placed in concentrated brine, a wonderful electrochemical reaction can make "Black Silver" has turned white again.

Therefore, knowing a little science can not only know the beauty of these silver ornaments, but also be useful for selecting more ideal silver ornaments. Even if the maintenance of silver ornaments can be asked, we can clearly understand Putting silver on your body will make your silverware play a bigger role.

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