Everyone at least once in my life came across a situation where silver plaques with a time appeared black raid. Of course, you can get rid of it by brushing silver with tooth powder, paste or wiping with a special solution, but why does it appear at all? Why do black jewelry on the human body turn black?
If we consider the blackening in terms of chemical processes, then silver, like many othersOther metals are susceptible to oxidation. The whole "secret" of blackening is the interaction of silver with another chemical element - sulfur. It is found in human sweat, water, air and cosmetics.
First, a thin gray film appears on the silver product after interaction w
The darkening of silver and the speed of this process also depends on the composition of the jewelry. To create jewelry, neither gold nor silver is used in its pure form, since these metals are very soft and easily deformable. That is why various metals are added to the alloy, for example, platinum, gold, copper, zinc and others. And the less in the composition of pure silver, the more it is prone to oxidation.
The worldly accepted share of silver in alloys for making jewelry is 92.5%, that is, the 925-th test, which is customary for us. Such an alloy is optimally suited for making jewelry and at the same time it oxidizes slightly.
In addition, silver can very quickly blacken after contact with various household chemicals or products, such as onions, salt, raw eggs.
If you want to buy a chain, bracelet, ringlet or other piece of jewelry that would not be oxidized at all, you should pay attention to the models covered with rhodium. Thanks to this substance, the decoration will not only not darken, but will also please with its unique bright shine. However, such a coating can be erased after a few years, and also split off or scratched by negligent handling of the decoration.
There is an opinion among the people that silver ornaments turn black on a person who is sick with something, and there is some truth in such conversations. What does it mean? As noted above, silver oxidizes from interaction with sweat of a person who contains sulfur. The more it is, the stronger the darkening will become.
Sweating is a natural process that is characteristic of a healthy body. That is, in itself blackening of ornaments can not speak about any problems with health. However, if it is noticeable that the decorations darken much faster than usual, and the sweating has intensified against the background of some pain in the body, it may be worthwhile to undergo a medical examination. It is worth watching the state of your body to make sure that the darkening of the silver does not indicate a developing disease. Of course, increased sweating is not always a symptom of the disease.
This phenomenon can be observed during physical exertion, during periods of stress or nervous tension. Another of the most common causes of darkening of jewelry on the background of increased sweating are hormonal bursts.
There is an opinion that such a reaction of the body with silver can occur due to kidney or liver diseases, however, this judgment has no scientific confirmation. Therefore, do not once again wind yourself and worry, it is better to think about how the lifestyle, care for the body has changed recently, whether new creams or cosmetics have been added.
Some medications may also affect the darkening of silver. They can change the composition of sweat, which is reflected in silver blackening.
If the silver cross or any other favorite decoration has darkened, do not get upset. There are many ways to get rid of the specific plaque:
To decorate the silver for a long time, you need to take care of them properly. First of all, do not forget that these are delicate items, to which you need a careful and accurate attitude:
If you follow these simple rules, jewelry will retain its beauty in its original form for many, many years, and they can be safely passed on by inheritance!
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