925 car model ornaments made of sterling silver in Taiwan's early silver building

925 car model ornaments made of sterling silver in Taiwan's early silver building Early Taiwanese old pieces have traces of man-made use on the surface, and they also have the charm of old pieces. They are very old. Silver will definitely turn black when exposed to the air for a long time. This is a natural phenomenon, and it has been treated to make it back to pure silver. Silvery white, very finely made, with very good texture, the wheel can be turned by hand Those who can accept the above will bid again, or ask questions first, thank you. Uses: ornaments. Note: The appearance is dirty, cracks, potholes... etc. Size: Length 10.5 cm and 4.5 cm Weight: Approximately 128 grams (with error). Mail: post office, supermarket. What is the difference between 925 sterling silver and 999 sterling silver? Sterling silver jewelry is divided into 925 sterling silver or 999 sterling silver, which means that the silver content is 92.5% or 99.9%. Of course, there are also products with other composition ratios. 925 represents the purity of silver, which is the highest purity of silverware, just like the purity of 999 gold. Because 999 silver is too soft and easy to oxidize, it is easy to bend and deform due to impact. It is necessary to add alloy to pure silver to increase the hardness to withstand multiple processing. In 1851, Tiffany&Co. introduced 92.5% silver jewelry and added 7.5 to pure silver. % Alloy, the perfect ratio is developed to make silver jewelry reach the most moderate hardness. Therefore, 92.5% has become the internationally recognized standard for silver jewelry. Personal physique. Can silver jewelry be used for drug testing? From my own practical experience, silver chopsticks will slowly turn black after touching preserved eggs or specially-tuned garlic soy sauce. Some sulfide substances and silver chemically change, and a layer of black silver sulfide is formed on the surface. Human skin secretions also contain a little bit of sulfide, which can also make silver jewelry black! Yes, but this is normal.