When buying a jade bracelet, you must first check the crack to prevent fatality.

Jade is a universally recognized jade. Its noble and elegant atmosphere always makes people think of the beauty in the painting. It is dignified and beautiful, quiet, especially the jade bracelet that women love. So how do we choose the ideal bracelet? What?

When purchasing jade bracelets, you should first check the cracks and prevent fatality. This sentence mainly contains two meanings: First, check for cracks. If there are cracks, depending on the size and number of the cracks, The decision is made; secondly, if there is a crack that affects the robustness and affects the service life, which can cause cracks in the future use, it cannot be purchased. But for the phenomenon of cracks in jewelry and jade, we should treat it correctly. There is a mantra in the jewelry industry: "Ten treasures are nine cracks, no grain is not jade", which means that there are very few gemstones and jade without cracks. Therefore, when purchasing jade bracelets, on the one hand, we must carefully observe them, on the other hand, they are not overly critical. Because there are very few jade bracelets, even if there are perfect items, the price will definitely be high. For some small, far-sighted, cracks that are difficult to see with the naked eye or ten times magnifying glass, you don't care, as long as the big side is too good to be satisfied. Otherwise, either you can't buy a favorite bracelet, or you can buy a bracelet, I don't know which day I found cracks in the bracelet, and I feel troubled by the imbalance of mentality.

Jade (stone) and cracks have different effects on the quality of jade pieces. Jade (stone) looks linear or line-like, its color is different from the color of the surrounding material, but there is no gap in the line. Jade (stone) is formed in the process of jade formation and growth. The cause of geological action, which is formed by the healing of the original broken jade, has little effect on the durability and firmness of the jade. It only affects the appearance of the jade piece; and the crack is another matter, it is more After the formation of jade, the cracks caused by the geological effect or the cracks formed by the external force such as firecrackers, tapping, impact or vibration during the mining, transportation, processing or storage of jade, these cracks often have obvious Cracks, cracks, and even the hand touch, gently scrape with the nails feel. The jade jade pieces with many cracks and obviousness have low economic value. Some cracks can be seen, but they can't be touched. The color of the crack is usually black or yellowish brown. Bracelets with many cracks, although not broken in a short period of time, are lurking with the danger of being easily damaged, especially affecting the appearance, resulting in an imperfect, unpleasant feeling, cracked and obvious jade pieces. The general price is very low.  

Extrusion is a metal forming process , in which billet is passed through a die , to get required cross section of component  .

 

Non cutting process

Production of Fixed cross section

 

Types of extrusion process

Direct extrusion process

Indirect extrusion process

Impact extrusion process

Hydrostatic extrusion process

Tube extrusion process


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