This topic starts with the classification of silver: silver can be divided into: pure silver, 925 silver, Thai silver, Tibetan silver
Sterling silver is silver with more than 99.99% silver, also known as 9.999 sterling silver. Since the hardness of silver is 2.7, the characteristics of silver itself make 9.999 silver very soft, which is not suitable for the increasingly rich and exaggerated style requirements of modern popular jewelry, so it gradually fades with use. Sterling silver is easy to identify by its appearance and is the true color of silver.
925 Sterling Silver: This is an alloy containing 92.5% silver and 7.5% copper. This is the standard silver for making sterling silver jewelry set by the international community. Also known as sterling silver in the UK. Nowadays, 925 sterling silver is usually plated with platinum (white rhodium) or gold to prevent the silver from turning yellow and black when oxidized or cured. 925 sterling silver without platinum plating is called "plain silver". Since 7.5% copper alloy is added to pure silver, the luster, brightness and hardness of silver are improved, and various complex and varied jewelry can be made. That is why we have today's colorful silver jewelry.
Taiyin: Typically 1,000lb silver, which is 99.9% silver. There are also some anti-Thai crafts that vulcanize 925 sterling silver with "ancient silver effect", also known as "Thai silver". Domestically produced Thai silver usually has a relatively simple process, so the price is lower than 925 sterling silver plated with platinum.
Tibetan Silver: Usually free of silver, this is an elegant name for cupronickel (copper-nickel alloy). Traditional Tibetan silver is 30% silver and 70% copper, as the silver content is still too low, it is no longer available on the market and has been completely replaced by white copper.
The sterling silver medical cup that everyone is talking about usually consists of an outer shell and a silver liner. First of all, you must make sure that the insert is made of pure silver, which means that it contains 99.9% silver. purity, the more confident you can use it! ?Let's start with the silver effect:
Silver has excellent antibiotic and sterilizing properties. Conventional antibiotics can only be effective on average against 6 types of microbes, while silver can kill 650 types of microbes. The thermal conductivity of silver is the most outstanding among all metals, and it can quickly dissipate the heat of blood vessels. Assuming that the thermal conductivity of silver is 100, then gold is 53.2, iron is 11.6, and platinum is 8.2. thermal conductivity decreases rapidly. The heat of the vessels has an excellent therapeutic effect in the prevention of various diseases!
When you drink water from silvercup, the positively charged silver ions can be separated to absorb the bacteria, and then let the bacteria lose their viability and die, that is, they can be sterilized. Both silver and gold are inert metals that do not react easily with common liquids such as boiling water! Drinking from silver cups is very beneficial.
It is widely believed among the people that silverware can be tested for poison. This statement is not scientific. Ancient, highly toxic arsenic (arsenic trioxide) contains trace amounts of sulfur, which causes a layer of black silver sulfide to form on the surface. silver and loses its original color. If the luster is high, poisonous arsenic can be found in the silverware, but highly toxic chemicals such as potassium cyanide and sodium cyanide do not contain sulfur, so the silverware will not turn black.
Precautions when choosing a silver cup
1. Determine if it is pure silver. If you don't know how to identify it, it's best to go to the brand's dealer to buy it. Remember not to buy cheap silver cups because it is irresponsible for your health!
2. Quality. The quality must pass the test, and there must be no accidents in use, otherwise it will break within a few days, in this case it is better to use glass or plastic cups.
3. Profitability. Choose an economical cup in your favorite style and you will be the happiest person in the world!
Also note during use: never use Disinfectant 84 for cleaning! Disinfectant 84 is a highly effective disinfectant based on sodium hypochlorite. Chemically reacts with silver. This will cause the inner lining of your silver cup to turn black and you won't be able to wash it off yourself!
Gong Yingtang, specialist in traditional Chinese sterling silver thermoses