Besides the monetary function, what are the "hidden attributes" of silver?

In ancient times, when silver was mostly used as money and decorations were used as money, it was said that silver was relative to gold. When it comes to money, you have to mention the silver ingots that have been used in ancient times. People in the Tang Dynasty may never see a penny or two in their whole lives. In the Tang dynasty, silver was mainly used by the state treasury, and there was almost no silver among the people. Most people use copper coins. In the Song Dynasty, with the appearance of the Maritime Silk Road and the development of commerce, silver officially entered the currency circulation system.

It was not until the Ming Dynasty that silver ingots were officially used. At that time, the silver ingot was equivalent to a large check. In the Qing Dynasty, silver ingots developed into our impression. This silver ingot in the late Qing Dynasty weighed 50 taels, and it was the heaviest silver ingot that could participate in circulation. Now there is such a saying in many film and television dramas. How did the words gold ingot, silver ingot and silver ingot come from? Yuan Dynasty ingots were no longer made into squares. In the song dynasty, the waist was closed, and in the yuan dynasty, the bottom was turned into an ellipse, and the wings on both sides rose. Later, the appearance of an ingot appeared. The name Yuanbao was probably decided in Zheng Zhi for three years.

"Silver needle tries poison", in many film and television works, there is no lack of the saying that "silver needle turns black". At the scene of "I have a family heirloom", the host also conducted some tests, but the silver needle inserted into the egg turned black. Are eggs poisonous? In this regard, experts explained that the cooked eggs have been placed for a long time, and a layer of green skin will appear between the egg white and the yolk. This is because amino acids degrade at high temperature and release sulfur bonds. The reason why silver needles turn black is that after silver reacts with sulfur, black silver sulfide is generated. According to the Record of Unfair Remembrance, the most common poison tested by the ancients with silver needles was arsenic. How is it measured?

What is the disinfection function of silver and what is its effect? Mongolians are famous for using silverware. Most Mongolian families have many silverware and tableware for drinking tea ... many of them are made of silver. This is a silver bowl that Mongolian friends will use when entertaining guests to toast. Silver is a precious metal for making daily necessities. Mainly because silver has the function of sterilization and disinfection, silver ions will dissolve in water when drinking water with silverware, which can kill some pathogenic bacteria and ensure people's health. On the grassland, it will last longer to hold fresh milk in silver bowls.

Silver plate photography. Speaking of black and white photos, I have to mention silverware, which is closely related to black and white photos. Black-and-white photography is a photography technique invented by French painter Daguerre. In this technique, silver plates are used to make images. Silver plate photography is to treat silver salt coating with water vapor. The photos taken in this way are exquisite, durable and layered, which is also a leap in photography technology. There are many old photos now, and they will be specially marked with "silver photos". It is this characteristic of silver that we can see more precious historical materials.