Mainly the overall modeling of jewelry, processing quality and other specific process quality.

Step 2 identify

Jewelry imprint should include manufacturer's code, name and content of precious metal materials.

3, jewelry weight

The price of silver jewelry is sometimes calculated according to the weight and processing fee, and the weight of jewelry is one of the important indicators. According to the standard, the weight of jewelry is measured in grams, and the tolerance of each silver jewelry is -0.05-0.04 grams.

4. Silver content

The silver content in jewelry is an important index of its quality. There are many methods for measuring silver content, which can be divided into chemical analysis and instrumental analysis. According to whether jewelry is damaged in the process of testing, it can be divided into nondestructive testing and destructive testing. In the daily inspection of jewelry quality supervision department, nondestructive testing is the main method, and density method is combined with X-ray fluorescence spectrum, electron probe and other large instruments for analysis. Everyone has his own principle of choosing jewelry. How much experience do you have in the face of the most popular silver jewelry?

First of all, it must conform to your temperament. We insist on people-oriented in the choice of silver jewelry. I believe that every piece of silver jewelry has its corresponding owner, and delicate little girls can choose fine bracelets. Fashion avant-garde girls can choose a simple and exaggerated set of silver ornaments or silver ornaments inlaid with sparkling crystals; You, with a strong lady's breath and a warmer temperament than daffodils, let the slender crystal necklace and graceful pendants decorate your jade neck; Red and green retro Macarthur agate, showing aristocratic temperament, is your elegant first choice.

Secondly, it should match your appearance. People with long faces should not wear long earrings. People with round faces should not use big earrings to highlight round cheeks. If the square face matches the triangle earrings, it is a disaster. If you have a pair of black and white eyes like autumn water, then choosing silver ornaments inlaid with gems will create a star-like charming effect.

Professional wear is suitable for matching exquisite silver ornaments with simple style and compact shape; Casual wear is suitable for matching personalized silver jewelry with unique design and exaggerated shape; It is perfect for Kawaii to dress up and put on lovely silver ornaments.

Note: Silver ornaments should not be mixed with gold ornaments, because their temperament and style are different, just as suits and dresses are not suitable for jeans.

Some styles of silver ornaments can be worn without cleaning after they get old and black. Nostalgia tastes great, too, just like a patch on jeans.

Silver jewelry is a fashion jewelry, so we should pay attention to changing the style of wearing frequently, and don't wear silver jewelry with too obvious fashionable elements and outdated.

Silver ornaments are not priced by weight, and the raw materials of silver are very cheap. Her value is completely reflected in design and craftsmanship, so the only criterion for choosing silver ornaments is whether you love them or not. First, because everyone's endocrine and physical condition are different, some people's sweat contains more acid, some people have less, and some people's body fluids have high sulfur content. These are all substances that cause the surface of silver ornaments to turn black, so everyone will have different results when wearing silver ornaments, and some people will be as bright as new after wearing them for half a year.

Second, sulfur, nitric acid and oxides in air and other substances (such as eggs and cosmetics) have a certain corrosive effect on silver. Silver jewelry is worn for a long time, and the combination of sulfur and silver will form a black silver sulfide film on the surface of silver jewelry. At first, it will show some tiny spots, and then spread into pieces, forming what people usually call silver scales, turning black and affecting the surface luster of silver jewelry. People usually mistake it for fading.

It is precisely because of these natural characteristics of silver that silver has a good health care function, and it can neutralize toxic substances in the human body when worn frequently. Silver ion has a strong bactericidal effect, which can kill 650 kinds of germs, and can be used as a tool for poison detection, which is very beneficial to human body. It can also accelerate wound healing, prevent infection, purify water and keep fresh. As the ancients said, wearing silver is accompanied by health and wealth, and the five internal organs are safe, the mind is calm, and the shock is stopped and the evil spirits are eliminated. In medicine, it has a much greater effect on human health than other precious metals. Many people like silver ornaments, but little is known about their maintenance. Some people even think that silver jewelry is difficult to maintain, but it is not. After understanding the reasons why silver ornaments turn black, we only need to spend some time in our daily life to make the silver ornaments we wear last as long as new.

1, silver jewelry should be cleaned before it is put away, and it is best to pack it in a closed bag to prevent oxidation and blackening. If the wearer sweats a lot, he can wipe the surface with a soft cloth every day to keep the luster and remove dirt. It is best to use special silver rubbing cloth for silver ornaments plated with platinum. Silver rubbing cloth can be purchased in silver jewelry brand stores. Note: Silver cloth contains maintenance ingredients and cannot be washed.

2. Daily cleaning of silver ornaments without platinum plating can be done by yourself, such as squeezing some toothpaste, adding some water, wiping with a soft cloth, brushing gaps with a soft toothbrush, and then rinsing with clear water. Don't touch the water on the silver ornaments inlaid with precious stones, so as not to affect the firmness of the glue. It is best to be cleaned by professionals in the store. )

There are many kinds of silver ornaments and different maintenance methods, so we can't generalize them. Many online maintenance methods can only be used as reference. It is best to ask the professionals in the store to avoid improper operation and damage to the beloved silver jewelry.

4, including the exquisite three-dimensional carving of silver ornaments, to avoid deliberate polishing. If you find that the silver ornaments are yellow, you should first clean up the thin seams of the silver ornaments with a small jewelry brush, and then gently wipe the surface with a silver cloth to restore the original silvery white and brightness. I suggest that if the silver cloth can recover about 80% silver, there is no need to use silver lotion and silver washing water, because these products are corrosive to some extent, and silver ornaments are more likely to turn yellow after using these products. Silver wipes contain silver maintenance ingredients and cannot be washed.

5. If the silver ornaments are not treated and collected after wearing, it is very likely that the silver ornaments will turn black. At this time, you should use a small jewelry brush to clean the fine seams of jewelry, then drop a drop of silver emulsion on the paper towel to wipe off the black oxide on the surface of jewelry, and then use a silver cloth to restore the original brightness of jewelry. After that, you should remember to do the daily general maintenance to prevent the silver ornaments from turning black again. Silver ornaments are difficult to rub white after many blackening. "Compendium of Materia Medica" records: "Silver scraps are pungent, flat and toxic; Raw silver is pungent, cold and non-toxic. " Because silver ions are easy to combine with sulfhydryl groups in protein, bacteria will die due to inactivation of respiratory enzymes. However, the properties of elemental silver are quite stable, and it is difficult to "release" silver ions. Moreover, protein is also an important part of the human body. It not only has economic value and elegant appearance, but also can be used as a drug detection tool. Using silver can detect whether food is toxic (this is because silver can easily react with arsenic (As2O3) commonly used in ancient times to generate black arsenic sulfide, but this does not mean that silver can absorb the so-called "toxin"), which is easy for the naked eye to identify. Before BC, the ancients knew that silver could accelerate wound healing, prevent infection, purify water and keep fresh. It can stop the growth of bacteria, but its other functions cannot be verified. The saying that "jade can prevent corrosion" is just a false conclusion that the ancients did too little research on natural science. Silver ions have excellent bactericidal effect. Ordinary antibiotics can only act on 6 kinds of bacteria on average, while silver ions can destroy 650 kinds of bacteria. However, silver ions belong to heavy metal ions, and the water disinfected with silver salts is definitely not suitable for drinking.

"The thermal conductivity of silver is the most prominent among all metals, and it can quickly dissipate the heat of blood vessels. Assuming that the thermal conductivity of silver is 65,438+000, that of gold is 53.2, that of iron is 65,438+065,438+0.6, and that of platinum is 8.2, this distinct thermal conductivity can rapidly reduce the heat of blood vessels, which has excellent curative effect in preventing various diseases. Silver has the function of absorbing toxicity, which is one of the reasons for its discoloration, so it has excellent disinfection performance. This discoloration is only a superficial reaction and can be eliminated with toothpaste or medicine. This shows that the importance of silver to health cannot be ignored. " This is a common gimmick for health websites to promote silver jewelry. In fact, most of the heat generated by breathing is excreted through sweat and will not come out of the silver ornaments, because the thermal conductivity of air is not good, and the heat carried by sweat and silver ornaments will eventually be discharged into the air. As for the "bactericidal" effect of silver, it is described above. Since ancient times, the status of silver ornaments has been in a relatively high position, which is not only a good ornament for decoration, but also a symbol of wealth. Although the development of silver jewelry has been growing rapidly, the ancient silver jewelry has not been forgotten by the world. On the contrary, some antique silver lovers have become more interested in collecting antique silver jewelry. Gu yin is good. It is not difficult to find real ancient silver ornaments. You can tell with a little attention.

During the Ming and Qing Dynasties and the Republic of China, especially in the Ming and Qing Dynasties, there were many old silverware with exquisite texture, extraordinary craftsmanship and elegant shape. Jewelry is often accompanied by jade and inlaid jewelry, which complement silver ornaments.

Ancient silver ornaments have some identification skills. In terms of color, as long as you wipe the cloth, if the luster is not obvious, it will be dull, and even trachoma can be seen, which is definitely not a good thing. Only when the cloth is slightly rubbed, it will show amazing, soft and bright color, which is the silver jewelry with high silver content.

Gently break it with your hand and try to distinguish its color between hard and soft. Generally, soft colors are good, but if white copper is mixed, it will be soft and should be distinguished from the appearance.

Workmanship is an important basis for determining whether ancient silver ornaments are worth collecting. If the pattern is rough and the seams are loose, the value will be greatly reduced.

How to distinguish ancient silver from new silver? The new silver sounded crisp, while the old silver sounded firm and dull. It was weighed out as soon as it was knocked.