1, silver will not fade. Seeing silver turn black is the result of oxidation in the air, not fading. After blackening, washing silver water and wiping silver cloth can make silver white. In addition, lipstick, high-concentration alum boiled water, etc. , can make silver white again.
2. Because Nepalese silver =925 silver, 925 silver will turn black in the air, so Nepalese silver will also turn black in the air. If it is left in the open air for about 1-2 months, it will have a very obvious color.
Extended data:
925 silver refers to adding 7.5% copper to silver when making jewelry. This alloy containing 92.5% silver and 7.5% copper is called standard silver internationally. Also known as the pound in Britain.
Yin Su
925 silver plated with white rhodium (known as platinum in the industry) can delay the yellowing and blackening of silver under oxidation or vulcanization as much as possible. 925 silver without platinum plating is called "plain silver" in the industry, which is easy to oxidize in the air.
Makasit
Thai specialty, the standard is also 925 silver content. It continues the traditional silver-burning blue retro process, and the hand-made silver ornaments are hard and not easy to deform. Natural gemstones, semi-precious stones and animals' teeth, horns, claws and other items are inlaid, and the things made have strong foreign cultural characteristics, and the price is generally higher than that of silver ornaments processed by machine assembly lines, but they are still favored by many consumers who pursue individuality and chic.
Many small jewelry stores that sell headdress clips also sell an old synthetic metal copied from Zhejiang and other regions, also called Macarthur or Tibetan silver. In fact, it is only non-ferrous synthetic metals such as lead and tin, not real Tibetan silver or white iron ore.
In the industry, Macarthur is a kind of silver jewelry produced in Thailand, with a silver content of over 92.5%, so it can be called Macarthur.
Miao Yin
Miao people like to wear silver ornaments. Silver ornaments are Miao people's favorite traditional ornaments, which are mainly used for women's decoration. There are many kinds of silver ornaments, from head to toe, everywhere, including headdress, neck ornaments, shoulder ornaments, chest ornaments, waist ornaments, arm ornaments, foot ornaments and so on. , cooperate with each other, reflecting the perfect overall decorative effect.
According to historical records, Miao silver jewelry has developed in southeastern Guizhou since the Ming Dynasty and has become a unique cultural category of Miao people. When people come to Qiandongnan Prefecture, they will buy some Miao silver ornaments as gifts for relatives and friends.
Miao silver usually makes jewelry by adding other alloys (such as copper) and 99 silver. Generally, the silver content of Miao silver is less than 15%, and the silver content of Miao silver is getting lower and lower. Several Miao Yin bracelets at cost will be sold at a minimum price of 50.
Tibetan silver
Generally speaking, the composition without silver is the elegant name of white copper (copper-nickel alloy). Traditionally, Tibetan silver is 30% silver and 70% copper, but now even this traditional craft of "Tibetan silver" is no longer visible in the market, and most of it has been replaced by completely white copper.
All kinds of fake silver: made of other metals and plated with silver to deceive customers. In the jewelry department, because only a part of the surface layer is detected, it is very easy to be identified as 999-foot silver or 925-foot silver jewelry because it is coated with a thin layer of 999-foot silver or 925-foot silver.
Baidu Encyclopedia -925 Silver