Yajin
Yajin Materials is an excellent imitation gold material successfully developed in China this year. It was issued by the State Science and Technology Commission and entrusted the Ministry of Light Industry to organize research and development of relevant scientific research units and factories. This scientific research achievement was awarded the third prize of Shanghai Science and Technology Progress Award.
Nowadays, various imitation gold materials in foreign countries have developed rapidly. The United States, Italy, and Japan all use imitation gold materials to make jewelry, indoor crafts, coins, eye frames, and leather bags. China's research and application of Asian gold materials is to catch up with the international level. According to the development results, the gold is very similar to gold in color, and its corrosion resistance is slightly higher than gold. For example, its resistance to discoloration: corrosion in a constant temperature (35 ± 2 ° C), constant temperature (80-90%) test chamber for 100 hours, still maintain high gloss and basically no discoloration; atmospheric corrosion in indoor environment for two years Basically does not change color. Jewelry made of gold materials can be used without gilding, which not only saves a lot of gold for the country, but also avoids environmental pollution caused by cyanide gold plating.
Nowadays, all kinds of jewellery made of Asian gold materials are not only loved by domestic consumers, but also well received abroad. During the Seoul Olympics, the relevant departments of China used the Asian gold materials to make panda imitation gold commemorative coins for sale. Athletes and local citizens bought them. Seoul merchants ordered various Asian gold products in bulk. In the spring of 1988, in the 22nd National Tourism Products and Domestic Crafts Exhibition, the Yajin series was awarded the Excellent Tourism Product Award.
Gild
At present, there are a lot of gold jewellery on the market. The appearance of these jewellery is the same as that of gold jewellery. The golden brilliance is colorful, colorful, and it is very attractive and inexpensive. The inner material of gold-plated jewellery is not a precious metal such as gold or silver, but some alloy materials of aluminum, zinc and lead. It is coated with a layer of gold on the surface of these materials, and the inner material is wrapped like a wrapping paper. , to play a decorative role, in order to compete with gold jewelry.
The merits of gold-plated jewelry depend on the success or failure of the gold-plated process. Gold-clad jewellery produced in the United States must indicate its characteristics and the proportion of K gold, such as (1/10.14K.GF) type, that is, jewelry containing 14K gold material, its gold content must account for the weight of the entire jewelry. One tenth, otherwise it is unqualified. If the gold-coated material adopts gold below 10K, or the weight of the gold package is less than one-twentieth of the total jewellery, the name “golden package†shall not be used.
The gold-plated jewellery has a high degree of wear resistance. Some of the gold-plated jewellery used for decades has the same color and appearance, and does not reveal the inner core.
At present, some scammers in the society have been tricked into the pawn industry by using the case that gold and gold are difficult to distinguish. The sixth issue of "Pawn Information" reported a case in which the Fujian surnamed Lin was deceived in the Qingdao Jinda pawnshop and was taken away by the public security department. According to recent understanding, the criminal suspect used fake ID cards and gold jewellery to impersonate real gold jewellery and defrauded more than 70 in Jinan and Nanjing, and received more than 400,000 yuan. Pawn shops that operate gold jewelry pawn business should be vigilant, pay attention to the identification of identity cards, and detect the true and false of gold jewelry in case of being deceived and avoiding economic losses.
Rare gold
Rough gold jewelry is a piece of jewelry made of thin gold materials. The thin gold material is a novel imitation gold material composed of copper as the main raw material, adding rare earth and other components. It has the characteristics of good wear resistance, hard texture and color similar to gold and not easy to fade. In view of its superiority over the general imitation gold material, it has become a material for the manufacture of higher-grade imitation gold jewelry.
Jewelry made of gold, the price is more expensive, with the general yellow-plated imitation gold jewelry, the price is cheap, but the coating is very easy to change color, lose the decorative iron, the jewelry made of thin gold material, the color can be 18K or 20K gold yellow, not easy to oxidize and fade, it is suitable for daily use.
Recently, some domestic manufacturers have also developed a new thin gold jewelry called rare gold magnetic medicine health jewelry. This kind of jewelry is coated with the characteristics of ordinary rare gold jewelry, and has special medical effects. It has certain curative effect on some common diseases and chronic diseases. Q According to the identification of some medical research institutions in China, its health care effect is more obvious. The successful development of rare gold magnetic medicine health jewellery marks a breakthrough in the use of jewellery, which will open up a new path for the versatility of jewellery.
However, it must be noted that although the rare gold jewelry can be 18K or 20K golden yellow in color, it is not K gold, so don't mistake K gold for economic loss.
K gold
K Jin's "K" is the preparation of the term "Karat". The complete notation is this: Karatgold (K gold), K gold is measured by: pure gold is 24K (ie 100% gold), IK The gold content is about 4.166%. The method of calculating the gold content with "K" is based on a carob tree on the Mediterranean coast. The carob tree has a light red flower, and the pods are about 15 cm long. The beans are brown and can be made into glue. No matter where the tree grows, the size of the beans is exactly the same, so in ancient times, people used it as a standard for measuring weight. Over time, it becomes a unit of weight for measuring precious, subtle items. At that time, the measurement of diamonds and gold also used this unit, which is “Karatâ€. It was not until 1914 that the international standard "Karat" was established as the current standard.
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