How to identify whether silver or silver plating?

1. Throwing method: Throw the silver jewelry from top to bottom on the table. The bouncing jewels with low bouncing and steady sound are high -colored silver jewelry; Or low -colored silver jewelry.

2, nitric acid identification method: use a glass rod to drop nitric acid at the mouth of the silver jewelry, which is brown rice and slightly green; it is dark green and black.
The silver chemical properties are not lively, but because silver and sulfur have special affinity, it can slowly generate silver sulfide in the air to make it darker and make silver impure. And in nature, silver and platinum are mixed with platinum. Therefore, the "sterling silver" in life generally refers to 925 sterling silver with 99.99%of silver or 92.5%of the content.
The expansion information:
silver decoration maintenance:

1, primary color, polished surface, the simplest. Wipe it with silver cloth. There are gaps on the surface of no polished surface, just wash it with silver water washing water.
2, the electroplating is too plating, wipe it with a soft cloth, because the electroplating layer is very thin, the rough wiping and the damage of the chemical items will affect the brightness of the surface.
3. When taking a bath, you must remove it and store it in a dry place. The sterling silver is a metal that is easily discolored, and of course it should be.
4, Tibetan silver, according to historical definition, is a alloy of about 30 % of the silver, but the Tibetan silver in the market is almost free of silver. It's just a handicraft of white copper alloy.

Reference information Source: Baidu Encyclopedia-Pure Silver

The method of identifying silver authenticity Silver jewelry steel printing and silver: There is a sign of "S925" or "AG925", which indicates that the metal silver content is 92.5%. This is the most common symbol, the most common jewelry silver on the market, and it is also a commonly used sign for general silver. Foot silver: There is a sign of "S990" or "AG990", which means that the metal silver content is 99%. This logo is mostly used on large silver jewelry such as silver ingots, silver ingot, and silver setting. Baoyin and silver -plated: There are steel prints with "SL" or "FS", which shows that this jewelry is silver -plated. Some silver jewelry uses 925 silver, while others use 990 silver. Which is the sign of sterling silver jewelry? The National Jewelry Quality Supervision and Inspection Center explained that national standards stipulate that 990 silver, 925 silver, and 800 silver can be used for silver jewelry. The silver jewelry now is generally 925 silver jewelry. The 925 silver jewelry is a sterling silver with a content of 92.5%, adding 7.5%of the alloy. The addition of the alloy is to improve the luster, brightness and hardness of the silver. And since Tiffini launched the first silver jewelry with a silver content of 92.5%in 1851, 925 silver has become popular, so 925 is currently used as a standard for identifying whether it is sterling silver jewelry. After polishing, the 925 silver jewelry shows a very beautiful metallic luster, and it also has a certain hardness. It can inlay gems and make mid -to -high -end jewelry. 990 foot silver, which is 99%of the sterling silver and 1%alloy. Because of its insufficient hardness, it is easy to deform after being made into jewelry. widely. 800 silver is 80%of the sterling silver with 20%of the alloy. The lower the purity of the silver, the easier it is to oxidize, so manufacturers rarely use it to make jewelry. The silver jewelry that is tested is reassuring. Although the raw materials of the silver are very cheap, there will be some manufacturers who are cheaper metal such as cadmium, iron, and copper in silver jewelry. Cadmium is harmful to the human body, and it is not allowed to be mixed in jewelry according to regulations. Manufacturers do this mainly to reduce costs and get higher profits. The copper wire is mainly mixed with the middle support frame in the silver lock. The supporting frame in the silver lock according to the national regulations should also be silver. Because the copper silk is hidden in the silver lock, consumers can't see it at all. Only when the jewelry detection is performed, it can see the true face of Lushan. Only when it is waiting for a long time, the copper rust inside is exuded can consumers find it. Although silver jewelry is not valuable, it is true and false. Although this phenomenon is not common, consumers should still master some methods of identifying silver jewelry. Consumers can be tested through the physical properties of the silver when purchasing. The usually test methods are: look at the color of jewelry: the higher the purity, the white the silver, the surface of the jewelry, the surface of the jewelry looks uniform and bright, and the color is moisturized. If it contains lead, the jewelry will show blue and gray; such as copper, the surface of the jewelry will appear rough, and the color is not moisturized.银 Jewelry Weight: Silver density is slightly larger than common metals. Generally speaking: "Aluminum is light, silver, and copper is not light and not heavy." Therefore, the weight can make a preliminary judgment on whether it is silver. If the jewelry is large and the weight is lighter, it can be preliminarily determined that the jewelry is other metals. Check hardness: Silver hardness is lower than copper, and is large than lead and tin. It can be tested with inconspicuous places with large head needles. If the needle is slippery, it is difficult to leave traces on the surface. The tin texture, the traces are obvious and prominent; if there are traces of the facts, but not obvious, it can be initially determined as silver jewelry jewelry. Listening rhyme: Silver jewelry jewelry throws sound, no elasticity, and the sound is "卟 卟 卟 听". The lower the color, the lower the sound, and the higher the sound, the higher the rhyme; if it is copper, the sound is higher and sharp, and the rhyme sounds are short and short; , No elasticity. Other methods will change color and even dissolve. If a drop of concentrated hydrochloric acid is dripped on the inner side of the silver jewelry, a white moss -like silver chloride sediment will be generated immediately. Other precious metals will not respond, and the copper is rolled with green bubbles. The density of silver is 10.53 grams / cubic centimeter. Smaller than platinum and gold, without falling feel. The needle can be traces or bend. This method can be distinguished from the moral bank jewelry of the silver. Squeeze the bend with your fingers, soft and flexible with high color, easy bending and not easy to break; the quality of the secondary bend is harder, or barely moves, and some can even be folded with your fingers; Knocking a few times will crack; if you fake it, you can't stand the bend and easily break. It is not an ideal way to test silver jewelry by the physical properties and experience of silver alone. Only by destroying silver jewelry can use chemical methods can the true and false and disadvantages of the true and false of silver jewelry. However, this is not reached by consumers. In addition to mastering some basic inspection knowledge when buying silver jewelry, consumers should also pay attention to whether the silver jewelry has relevant certificates, certificates, and certificates. Only the silver jewelry detected by the testing agency can buy it. In addition, the silver content of silver jewelry must be accurately indicated that consumers should check whether there are "925" on the jewelry when purchasing. "925" is a symbol of sterling silver. As long as there is "925", you can ensure that what you buy is a real sterling silver jewelry. When buying, pay special attention to whether its deduction can be deducted and reliable. When buying the silver chain jewelry, you should flatten it to see if the chain ring is knotted or bent. The price of silver jewelry is determined by the content of precious metals, structural design and craftsmanship, so the most important criterion for choosing silver jewelry is to depend on whether you like it.

As long as you prepare a pliers, a lighter (the color of the flames is not green as long as it is green), a piece of silver cloth. Use pliers to pinch the suspected silver plated jewelry with pliers (not using a pliers to use your hand to hold it, I hope you Just don't hot until you are so good ..), use the lighter to burn this suspicious jewelry. The time lasts about 5 to 10 seconds. If the flame of the lighter becomes green, then congratulations, you found the silver -plated jewelry of mixed water and fish; The fire of the lighter is still the original color, then congratulations, your jewelry is made of sterling silver. After the results come out, you will be very depressed. The red copper color, if it is sterling silver, then the color is black paint.), Don't worry, first put the jewelry as one side. , That is, "oxidation reaction". (Khan ... I hope I say right ...) Silver and oxygen react, then compounds are silver oxide (that is, the black paint you see The gadgets of the paint ..). After the copper and oxygen react, the red copper -colored copper is out. When the silver burns, the flame has no color change. It has become green. So how do you remove the silver oxide? At this time, you need to dispatch the silver cloth .. Use the silver cloth to force it. If it is copper, sorry, I can't help you restore it ... but I can't help but mean that others can't. One layer of silver goes up, the price will not be very expensive. Warm reminder: 1. This method is particularly suitable for JMS that is allergic to non -silver. Once a non -silver jewelry is identified, it is immediately sent to the trash. Important. In order to clearly distinguish the color of the flame, please use the flame color to lighter with blue. Also, do not burn too long. In particular, you can not burn the jewelry until red. It is still scrapped. 3. The inspection environment is also very important. Be sure to keep the circulation of the air. 4. Do not touch it when the jewelry is just burned. Then, then, then