How to choose jade raw materials

How to choose jade raw materials

Wipe the skin

Rubbing the skin is an ancient rule, also known as suede or rubbing stone, which is a conservative method of opening gambling stones, because it is easy to remove the green in the specific part of the jade, it is easy to remove the green, so rub The effect of the leather is good and safe. Wiping the skin mainly depends on the fog, the bottom and the color. Because of the rubbing, you can see some changes in the interior of the jade with strong light to judge the depth of the green and the width and gradation. The order of rubbing the skin: one rubbing, two rubbing, three rubbing, four rubbing flowers. There is only one purpose for rubbing stones, which is to find the true green color.

Cut stone

The original cutting method was to use a bow saw to press sand and slowly saw the stone. If it is found that the cutting cannot be continued, it is easy to take measures to save. There is also a jade cutting machine that uses a diamond-coated layer to cut the blade, which is accurate and quick. To reduce the loss and dust pollution, and to protect the cutting blade, the oil-immersed cutting machine is often used, but the oil is stuck in the oil or water due to the clamp. It is not easy to see the cutting process, you must completely solve it to know the win or lose. Generally, the knife is cut from the mouth of the mouth or the knife is cut from the bowl. It can also be cut from the pine flower or the crack. When the first knife is not visible, the second knife and the third knife can be cut. The jargon says that "one knife is poor, one knife is rich" refers to this truth.

millstone

The grindstone is for polishing, showing the transparency completely, so that people can see its color or water. If the raw material is thick and not polished, the method of applying clear water to the original stone may be used to increase the transparency of the jade raw material. One type of grindstone is a dark bet (small bet), the stone does not have any scratch marks, and there is no natural break; the second is a half-bright half-dark bet, in the case of a knock, a mouth or a small gap on the stone, It is possible to see the water, color and other clues inside the gambling stone, and to gamble on the rest of the gambling, which still has a large gambling.

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