Several basic knowledge about silver

1. Silver is one of the precious metals, the symbol Ag, is widely circulated among the people, and once circulated as currency. Silver is silver white, with a relative density of 10.49 and a melting point (961°C). Easy to smelt, hardness 2.5, strong ductility, insoluble in alkali and most organic acids, easily soluble in nitric acid and hot sulfuric acid, combined with sulfur dioxide in the air Once circulated as currency. Silver is silver white, with a relative density of 10.49 and a melting point (961°C). It is easy to smelt, with a hardness of 2.5, strong ductility, insoluble in alkali and most organic acids, easily soluble in nitric acid and hot sulfuric acid, and turns into brown ag2s after being combined with the sulfur dioxide in the air. It has been used to make jewelry since ancient times. The price is medium. Usually set with less expensive gems. 2. The fineness of silver, expressed in thousandths. Pure silver: the content of silver is not less than 99%, and the imprint is pure silver or s990, silver 990. 925 silver: not less than 92.5% silver, the imprint is s925 or silver 925. Since Tiffany launched the first set of silverware containing 925/1000 silver in 1851, 925 silver has become the main force of silver jewelry in the market. Due to the addition of 7.5% copper, the hardness and luster of silver All have improved. Sterling silver is soft and easily deformed. When making silver jewelry, a certain alloy is usually added to increase the hardness of the silver. It is more suitable for the production of jewelry. Most of the silver jewelry made by European goldsmiths is 925 silver, but other Some silver jewelry with hand-engraved craftsmanship still uses the international standard 1# pure silver with a silver content of 99.95% due to the production needs. 3. Craft silver: Thai silver: silver jewellery processed by the burnt orchid process. Black silver: Cover the silver jewelry with agpbs mixture. After melting, it will form a glassy covering layer, which produces a special black and silver with a sharp texture, a strong color contrast and a relatively increased hardness. 4. Silver's health care effect: Silver has a bactericidal effect, and food with silver tableware is not easy to ferment and become sour; silver compounds can treat burns and coat wounds; silver chopsticks can detect sulfur in food. Previous: Identification of S925 Silver Jewelry Next: Matching Silver Jewelry According to Your Style