evening jewelry wholesale
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evening jewelry wholesale
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kate spade inspired jewelry wholesale Gold crafts are cultural and creative products that integrate precious metals and Chinese culture through creative design and modern craftsmanship. Its products have distinctive cultural attributes, showing high design value, process value, and commemorative value. Now let us see it. Take a look at the knowledge of gold crafts.
. Introduction to gold crafts
Gold crafts are a type of precious metal crafts, referring to precious metals such as gold and silver. According to the material, it can be divided into: pure gold products, sterling silver products, and gold and silver inlay products; according to product forms, their main expression forms are: coins, chapters, bricks, and three -dimensional three -dimensional categories.
. Value of gold crafts
Golden crafts collection currency, finance and commodity attributes in one body, "gold and natural currency" reflects its currency attributes, gold preservation and avoidance of gold The insurance function reflects the financial investment attributes, and the unique physical chemical properties of the gold make it an important application in the industry.
. The identification of gold crafts
1. See the color
True gold, fake gold. Gold is better, while the color of sand gold is a bit green. If the golden jewelry of Jiuzang has "copper turns green, silver turns black, and gold will never change color". High purity gold is golden yellow, pure and soft in color.
2. Consciousness
Whether it is gold jewelry or platinum jewelry, it usually has gold jewelry printing. For example, the golden ring will be printed with the words "AU"> 999 on the inner wall. If some jewelry is engraved with the English letter "GK", the content is "gold -plated". Consumers should identify whether there are seals on the jewelry, whether the seal meets the above provisions, whether it is clear, etc. to determine the authenticity of gold jewelry.
3. Test hardness
The higher the gold content of the jewelry, the softer, and it is easy to bend with your hands, good toughness, not easy to break. ; The lower the gold content, the harder it is. It needs to be bent with greater strength, and it is easy to break. When painting with hard things, scratches are not obvious.
4. Oblique
The weight is higher than other metals compared with other metals. The same volume of gold is 1.8 times the weight of the silver and 2.2 times the copper. Therefore, the real gold bearing should feel heavy in hand, and fake gold feels lighter.
. The maintenance method of gold
The gold is relatively soft and easy to deform, so do not pull the necklaces and other accessories. Take off the accessories when you sleep to avoid deformation. When you do n’t wear it for a long time, apply a velvet wrap and put it in the jewelry box to avoid rubbing and damage with other jewelry. Chemical substances such as detergent and disinfectant will change the color of gold, so you should remove the gold jewelry before doing cleaning work and swimming to avoid chemical changes in the surface layer. Pure gold jewelry should avoid direct contact with cosmetics such as perfume and glue. When encountering mercury and lead cosmetics, chemical reactions will be generated, which can easily lead to white spots on the surface of the gold jewelry. At this time, as long as you roast it under the alcohol lamp for a while, you can restore the original color. If you cannot solve it, you can get gold and silver jewelry stores for professional jewelry care.
five. According to the "Regulations and Naming Methods of the Pigmentation and Name" issued by the State Administration of Quality Supervision and Inspection and Quarantine of the State Administration of Quality Supervision and Inspection: The minimum value of 99.0%of the purity is 99.9%of the gold and its alloys with a purity of 99.9%. For thousands of gold; the minimum purity value of 99.0%is silver and its alloy, which is foot silver; the minimum purity value of 99.9%is silver and its alloys, which are thousands of silver. According to the general agreement of the precious metal craft industry, gold products are marked with AU with AU with a purity of thousands of points, and silver products are marked with the purity of the product by AG with the purity of the purity. Example: AU99.95, AG99.9. Compared with precious metal jewelry, there is no significant difference in the composition of the main raw materials, but the main consumer groups, product efficacy, design concepts, and sales channels of the two are obviously different. The two are different market segments. Gold craftsmanship collects currency, financial and commodity attributes in one body. "Gold and natural currency" reflects its currency attributes. Gold preservation and risk aversion function reflects financial investment attributes. application.
above is the knowledge of gold crafts, I hope to help you.