Some people say that jewelry is the "second face" of women. Although this metaphor may not be appropriate, with the improvement of living standards, the purchase of gold jewelry by Chinese residents is indeed rising. However, to buy gold jewelry, it is not enough to have money, and the relevant quality knowledge is also indispensable. Today, we invite quality inspection experts from gold jewelry to give you some knowledge of gold purchase and use.
Knowledge of the use of gold
Q: Gold jewelry is worn for a long time, will it be significantly reduced in weight?
Gold jewelry is worn for a long time and will wear out. However, as long as it is worn and properly maintained, the loss of wear (weight) is trace amount. According to the test results, the total quality of the gold necklace changed slightly after wearing for a long time, but the change will not be great.
Q: Some consumers complain that the 24K gold necklace has been getting longer for a while. Is this a quality problem?
First of all, 24K gold refers to gold with a gold content of 100%, which is the theoretical value. Gold is ductile and soft. Necklace (gold content ≥ 990 ‰) necklace, thousands of gold (gold content ≥ 999 ‰) necklace due to high gold content, if not properly worn, will cause the necklace to become longer, but this is not a quality problem. Therefore, consumers should be careful not to pull and carefully pick when wearing gold necklaces.
Q: Some people say that wearing a gold jewelry to wash their hands and bathing will not have any effect on the jewelry itself. Is it true?
It is not recommended to wash your hands in gold jewelry. First of all, it is easy to damage the jewelry; secondly, shampoo, shower gel, etc. may chemically react with other trace filler metal materials in gold jewelry.
Q: Online said that the identification of gold depends on biting. The more obvious the tooth marks, the higher the purity, is this true?
This statement is wrong. The more obvious the tooth marks after biting, the only the lower the hardness of the bite. Other metal materials also have lower hardness, and can leave tooth marks after biting. The depth of the tooth marks alone does not indicate the purity of gold.
Q: Some people say that the purity of gold can be distinguished by color. The higher the color, the higher the purity. Is this true?
The color and purity of gold are not necessarily related. Some 18K gold colors are also pure yellow. It is unscientific to determine the purity of gold by simply observing the color with the naked eye.
Q: Some people say that platinum and platinum are the same substance. Is this true?
Platinum is also known as platinum, and the chemical element symbol is Pt. However, it should be noted that platinum and white 18K gold (white 18K gold) cannot be mixed. White 18K gold (white 18K gold) is a white alloy of gold and other metals.
Q: In the past few years, colored gold jewelry is very popular. It is said that the color gold will be discolored when worn for a long time. Is it true?
The winnings generally refer to the colored 18K gold. The current process of 18K gold can have many colors: white, yellow, rose, black, etc., some of which are the colors of their own alloys, and some are the colors of the coating. The color change of 18K gold is more complicated. If it is the color of the coating, the color change will occur after the coating fades. In the color of the coating, some formulas (the type and content of the filler metal materials of different formulas are different) are easy to oxidize. It can also cause discoloration.
How to safely buy gold ornaments
Before buying: 1 first understand some of the common sense of buying goods, do a good job, master some simple identification skills, if you have the conditions, please ask the relevant professionals to buy together. 2 Select large-scale shopping malls or brand-name stores with large scale, good reputation and quality assurance, and try not to buy them in personal hands or in tourist areas.
When shopping: 1 shop than three. Choose from processing quality, style quality, inlay quality, price and after-sales service, and carefully observe the quality of the gemstone. 2 Carefully review and check the identification of the product, including imprints, labels and other marks. Whether the imprint is clear and complete (manufacturer code, material and purity). Whether the contents of the label and other identifiers are complete (including the product name, quality or total quality, product quality inspection certificate, product standard number, producer name and address or sales unit name and address, Chinese warning instructions, etc.) Understand the quality of the product. 3 Request all valid purchase vouchers for the goods written in Chinese and the “Three Guarantees Card†for the quality of the goods. The content of the valid purchase voucher should include as much as possible of the label, but at least the name, quality, and carefully check the consistency of the content. At the same time, the relevant quality commitment of the merchant is implemented on the valid purchase certificate. 4 Learn more about the use, maintenance and precautions of the product.
After purchase: 1 When using accessories, remember the requirements for use, maintenance and precautions. So as not to create unnecessary disputes. 2 Properly keep the valid purchase certificate of the goods, the “three-package card†of the product quality, the labels and other marks of the goods, and provide evidence for after-sales service and trade-in. In the event of a quality dispute in the future, the complaint is well documented and there are rules to follow.
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