Silver is one of the precious metals, with the symbol Ag. Silver is silvery white with a relative density of 10.49 and a melting point of (96 1℃). Insoluble in alkali and most organic acids, soluble in nitric acid and hot sulfuric acid, combined with sulfur dioxide in the air, it turns brown Ag2S. 925 silver is 92.5% silver and 7.5% copper, which improves the hardness and luster of silver.
The purity of silver is expressed in parts per thousand.
Foot silver: the silver content is not less than 990‰, and the imprint is foot silver or S990 plus silver 990.
925 Silver: The silver content is not less than 925‰, and the mark is S925 or Silver 925.
2, silver jewelry processing technology
Carving technology: this is an ancient gold and silver processing technology, which is very common at home and abroad. Hammer the gold and silver thin, then chisel it into a relief effect, or chisel out rich decorative patterns. Generally speaking, the larger the area, the richer the effect.
◆ Melting method: This technology is very common in Europe and is only used to make silver. The method is to use the physical characteristics of uniform and rapid heat conduction of silver, blow with fire, heat the thin silver sheet to the moment of melting, remove the heat source, and make uniform wrinkles on the silver sheet. Jewelry made of this material has strong decorative effect and natural charm. There are also some ornaments with dripping effect, which are made of silver, far better than gold and very charming.
Japanese wood grain metal: the main material is also silver, and the production method is very interesting, artistic and decorative. The method is to weld pure silver with different contents of copper-silver alloy, nickel-silver alloy, copper, brass and copper (sometimes with a little gold) layer by layer, and then knead and flatten it, so that the metal surface will have different color and texture effects.
Black silver inlay technology: This is an alloy decoration technology for silver. This technology is widely used in the Middle East, Russia and Thailand. Black-and-white jewelry is designed with carved or chiseled silver as the base, and then the pattern is filled with pure black copper-silver-lead alloy. After polishing, the silver pattern is exposed, and the contrast between black and white is strong, showing an extremely dignified.
3. Advantages of silver jewelry
Silver jewelry has various styles, moderate price, can keep up with fashion and is easy to match with clothing.
B. Silver jewelry overcomes the two disadvantages of high price of other precious jewelry and low value of artificial jewelry, and combines good quality and low price, exquisite style, exquisite workmanship and elegant taste, which truly meets the fashion needs of consumers and forms a new fashion trend.
4. Classification of silver jewelry
4. 1. Classification by variety: basically divided into six categories: hair accessories, ear accessories, neck accessories, hand accessories, foot accessories and clothing.
◆ Hair accessories include: hair clips, hair flowers, etc.
◆ Earrings include: earrings, earrings, ear cords and ear hooks.
◆ Accessories include: necklaces, pendants and collars.
◆ Jewelry includes: rings, bracelets and bracelets.
◆ Footwear includes: anklet and anklet.
◆ Clothing refers to accessories on clothing, including bow ties, tie clips, breastpieces, cufflinks, etc.
4.2. Classification according to process treatment: It is basically divided into bright silver, primary silver (silver), old silver and white iron ore.
4.3. Classification by inlaid gems: Mainly classified according to different inlaid gems. Generally, the inlaid gems mainly include zircon, garnet, agate, crystal stone, maxite, turquoise, amber, shells, meteorites and so on.