What method can I identify the purity of silver (silver ingots)?
What method can only contain silver, aluminum, etc., how can you know the content of the lead aluminum?
3 thoughts on “How to identify the purity of the silver ingot”
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The identification of the old silver ingot
. Look at the color of the silver ingot.
The silver's color is white and moist and calm. There are golden brown colorful light in the silver ingot pores. The color of the silver ingot itself is white. Because the old silver ingot is used in the soil, it is damaged and oxidized by people. A layer of silver rust and paste are generated. The color of this silver rust and paste is mostly gray or gray -brown, and the color is warm.
. Seeing the inscriptions of the silver ingot
silver ingot inscription refers to the text that is carved or cast on the silver ingot when casting the silver ingot. , Poor, official or craftsman's name. In order to ensure the quality of the silver ingot at that time, the inscription was used to use the method of signing and painting, and it was responsible for the silver ingot of the scriptures, but now it has become an important basis for us to identify the true and false silver ingots today.
. Seeing silver ingot shape
The variety of silver ingots in my country and different shapes. It is an important part of my country's currency culture and currency art. It is generally rectangular strips. The shape of the silver ingot of the Song Dynasty is mainly based on the shape. Compared with Tang Yin, the shape becomes wider and thicker. There are no inscriptions, the edge of the perimeter is raised, the inner concrete in the middle, the length of the silver ingots in the Ming Dynasty becomes shorter, the thickness increases, the arc shaped at both ends disappears, and the peripheral edge increases, especially the two ends are more prominent, forming a double wing; It can be roughly divided into several categories such as ingot, round, rectangular, square, 砝 ，, and archway shape.
. The weight of the silver ingot and listening to the sound
The cast weight of the casting of silver ingots has no uniform regulations before the Qing Dynasty, but the weight of the two representatives of the silver is different. Song is 39 grams, yuan is 36.6 grams, and it is 37 grams. The Qing Dynasty was generally between 34 and 38 grams. The silver ingots of the Qing Dynasty and the Republic of China were basically uniformly unified in weight to five, two, 12, and fifty two silver ingots. The sound of listening to the silver ingot is mainly anti -packed shell fake ingots. For doubting silver ingots, take another silver ingot to knock its ingot.
5. Seeing the forming of silver ingots
The bottom and side honeycomb size, how much, and depth of the silver ingot is another important basis for identifying true and false silver ingots. Any honeycomb is deeper, dense, round and round in the cave. There are beads, and those with colored luster must be true silver ingots. All honeycomb shapes must be naturally large, with varying depths, and human -made honeycomb shapes are just the opposite.
Pay content for time limit to check for freenAnswer KillingnYou can identify from the following aspects: 1. Look at the color: the higher the purity, the white the silver, the surface of the jewelry, the surface of the jewelry looks uniform and bright, and there is a moisturizing color. 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. 2. Check the hardness: The silver hardness is lower than the copper, and it is larger than the lead and tin. It can be tested with the inconspicuous places where the jewelry of the jewelry can be scratched. Lead and tin texture, the traces are obvious and prominent; if there are traces of the physical objects, but not obvious, it can be initially judged as silver jewelry. 3. Type weight: Silver density is slightly larger than common metal. 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. Essence If the jewelry is large and the weight is lighter, it can be preliminarily determined that the jewelry is other metals. 4. Listening rhyme: Sterling silver jewelry throws the ground, no elasticity, and the sound is "卟 卟 卟 4". 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.nThank you for your trust. I have to answer the above. I wish you a happy life ~ I hope to help you. If there is any need to solve it, please ask questions at any time.n1 morenBleak
The silver jewelry can be divided into sterling silver, pattern silver and color silver from high to low. According to the processing method, it can be divided into cast silver, creating silver and silver fine work products. The identification of silver jewelry can also adopt methods such as seeing color, test hardness and elasticity, weight, listening rhyme, reagent test and other methods. The silver jewelry has a color of more than 97 %, the epidermis is white and delicate, and the luster is soft and pleasant. The lower color of the skin is blue or gray, and sometimes it is yellow and black.
The silver jewelry itself is very plastic and has a variety of shapes. It is no longer a simple sterling silver jewelry in our impression. It has a lot of fashion elements in styling, variety, and craftsmanship, and the sales of silver jewelry are also increasing year by year.
In addition to sterling silver jewelry, there are also black silver jewelry, Tibetan silver jewelry and color silver jewelry. The temptation of silver jewelry is that it can inlaid gems or imitation gems and other materials, which is more diverse.
The raw materials for silver are cheap, but some manufacturers will add cheaper metals such as cadmium, iron, copper and other cheap metals in silver. 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.
The silver jewelry is not valuable, but there are true or false. Although this phenomenon is not common, consumers should master some methods to identify silver jewelry. Consumers can be tested through the physical properties of the silver when they buy. The usually inspection methods are:
In the color of the jewelry: the higher the purity, the white the silver, the surface of the jewelry, the surface of the jewelry looks uniform, there is any polish. 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.
The weight of jewelry: Silver density is slightly larger than the general common metal. Generally speaking: "aluminum light, silver weight, copper is not light and not heavy." Therefore, weight can be used for it. Whether to make a preliminary judgment for silver. If the jewelry is large and the weight is lighter, it can be preliminarily determined that the jewelry is other metals.
The hardness of the hardness is lower than the copper, and the large and tin is large, which can be tested with the inconspicuous places where the jewelry is scratched by large head needles. If the needle is slipped, it is difficult to leave traces on the surface. Copper jewelry jewelry; if it is a lead and tin texture, the traces are obvious and prominent; if there are traces of the physical objects, but not obvious, it can be initially determined as silver jewelry jewelry.
The sound rhyme: Silver jewelry jewelry throwing the ground, no elasticity, the sound is "卟 卟 卟". 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.
The physical properties and experience of silver alone are not ideal to test silver jewelry. 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 according to the content of precious metals, structural design and craftsmanship. Therefore, the most important criterion for choosing silver jewelry is to depend on whether you like
925 Silver Jewelry. Xiao Knowledge
About 925 sterling silver
It silver is an indispensable combination metal in K gold jewelry, but as a silver -based jewelry, it is mainly high -purity "standard silver" one kind.
The hardness of the silver is 2.7. In order to improve its hardness and obtain the best molding effect, it is necessary to add 7.5 % copper to the silver when making jewelry. This silver containing 92.5 % and copper -containing 7.5 % alloys, which are called standard silver internationally. It is also known as the British Sterling. In addition, there are foot silver jewelry with a silver content of 99 % in the market.
925 Silver is the international standard silver for the international silver jewelry. It is different from 9.999 silver, because the purity of 9.999 silver is relatively high, it is very soft and difficult to make complex and diverse accessories, and 925 silver can do it. The 925 silver jewelry is not 100%of the silver content, because the 7.5%alloy added to the sterling silver improves the luster, brightness and hardness of the silver. Only we have a colorful silver jewelry today* _*
If of the identification of silver
1) mark. Silver jewelry should generally be marked with Yin's English abbreviation ("S" or "Sterling"). The mark of the standard silver is S925. Foot silver's mark is S990. However, many countries do not print on silver jewelry.
2) color. The silver jewelry is mostly yellowish white, with a soft metallic luster. Because it is easy to oxidize, the color will become dark yellow and white.
3) Heavy. The density of silver is 10.53 grams / cubic centimeter. Smaller than platinum and gold, without falling feel. Steel needles can draw traces or bend. In this way, it can be different from the platinum owner, K platinum or imitation silver.
4) acid test. Silver will change color and even dissolve. If a drop of concentric 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 have no such phenomenon.
5) sound rhyme. After the standard silver jewelry landed, the sound was dull, no bounce, no rolling.
The maintenance of silver jewelry
The natural phenomenon of turning the silver jewelry is black, because sulfur and oxide in other natural media have certain corrosion of silver After wearing it for a while, there will be some tiny spots (sulfide film), which will spread into pieces for a long time, and even become black. Even if the protective film is plated on the surface of the jewelry, if you do n’t pay attention to time, you will still be still if you do n’t pay attention to it. Oxidation effect. Therefore, the current silver jewelry has some color changes due to oxidation. However, if you pay attention to the following points, you can extend the bright period of your baby jewelry ~~~~~~
Wear precious metal jewelry to avoid collision deformation or abrasion.
It hope to help you