When the old jade encounters new standards | most of the old jade that is well-ordered may not be A goods

"The Qing Dynasty jade that is circulated in the test can be found in the modern machine, 99% will show that it is B goods." That is to say, most of the old jade that is well-ordered is not necessarily A goods. Yao Zheng, director of the Jade Collection Committee of the China Collectors Association, told a lot of jokes about jade collectors in an article.

I often hear Tibetan friends say that the old jade can't pass the machine inspection. In order to find out, last week I chose a Qing Dynasty double-sided embossed "more than a year" full of green square green cards, sent to a nationally certified gem identification center for testing. The identification result is “pickling, filling, dyeing treatment”, in other words, B+C goods.

According to the inertia of people nowadays, the jadeite of A goods is not worth the money, and there is no collection value. It is difficult to circulate in the market regardless of new and old. If the old jade pieces can't pass the machine test, they can't get the A-car jade certificate. Not only does the jewelry and jade market not recognize its value, but ordinary consumers are also difficult to accept.

According to the current popular saying in the Chinese jewellery and jade market, jadeite can be roughly classified into A cargo, B cargo and C cargo according to its color. A goods refers to natural jade without artificial treatment. B goods are made of strong acid soaking corrosion, removing impurities, and then filling the cracks with resin or glue to make the jade of the species, water and color greatly improved. C goods are dyed jade, belonging to true jade false color. B goods, C goods jade generally imitate the quality of A goods jade, but the value of A goods is very different.

Due to the large market demand for the jade products in the Qing Dynasty and the Republic of China, the supply of high-quality jade raw materials is small, and the market price is expensive. The process of over-acid stewing wax is usually used to optimize the color of the jade surface. The stewed wax process uses the insect wax produced in Sichuan Province - an organic substance secreted by the white wax insect parasitic on the banyan tree or ash tree. The wax layer will form a crystallized organic substance on the surface of the old jadeite. Protective film. This traditional jade processing technology only improves the coloring characteristics of the jade surface, and does not change the internal structure of the jadeite product. In the past, the industry-approved jade surface normal and reasonable optimization technology is also recognized by the industry. However, according to the standard of "Jade Cui Grading", these old jade products are unfortunately reduced to B goods, C goods. During the Qing Dynasty and the Republic of China, there were not only dyeing techniques for jade products, but also craftsmanship for surface beautification of jade, rhinoceros, coral, hardwood and other materials.

It is understood that the national standard of "Jade Cui Grading" was implemented on March 1, 2010. The standard is mainly for the "natural uninlaid and inlaid polished jade grading rules" for the mining and processing of new pits. That is to say, before 2010, the various jade products mined and processed in the Chinese market were not standardized by a national and standardized quantitative indicator system for the jewelry and jade industry. Due to the limitations of the national standard jade sample collection database, the "Jadeite Classification" standard may not be fully applicable to the testing and certification of the old pit jade products processed and manufactured in the Republic of China.

In the face of this embarrassing situation, what should people do to collect old jadeites? In fact, the collection, what is required is "people give up my take." The cost that others can see and risk-free will increase dramatically in my hands. Thinking about this meaning, I am more determined to consolidate the confidence of the old jade products.

In fact, the "Jadeite Grading" standard and the old Jade collection are two different things, and the detection indicators of the two are not the same. The standard of "Jade Cui Grading" emphasizes that jadeite has not been treated by hand, and the surface of jade has no chemically contaminated inorganic components that are harmful to the human body. However, the old jadeite must first identify and confirm that the jadeite products are old and beautiful. . What's more, the jade processing technology and processing materials in the Ming and Qing Dynasties will not form inorganic chemical pollutants harmful to the human body, and will not harm people's health after wearing. In addition, the old jade products carry a wealth of historical, cultural, scientific and technological information, with irreplaceable historical heritage value, the taste is the old taste. Therefore, I would rather collect B+C old jadeite, and I will not buy a new piece of A goods.

4.7 Inch TFT LCD

Serial Lcd Display,Serial Lcd Module,4.7 Inch Tft Lcd,Tft 4.7 Touch Screen

Shenzhen Yetai Optoelectronics Technology Co.,Ltd. , https://www.yetailcd.com