The Ming and Qing Dynasties furniture, which has the most potential for appreciation, includes Ming-style furniture made by the literati in the Ming and Qing dynasties, mostly Huanghua Pear; and the court furniture made in the Imperial Palace in the Qing Dynasty, mostly rosewood. So, what factors determine the market value of a classical furniture? The first is the material. More than 80% of the market value of classical furniture is determined by its material. Among them, the most market potential is rosewood, followed by huanghuali and mahogany. In the furniture market, materials are always the dominant price. Secondly, the vintage of classical furniture is also very important. The third is the style. For example, now a large cabinet may not sell the Eight Immortals table, and an Eight Immortals table may not sell the Taishi chair. Because the demand for furniture determines the market, and the furniture of the hall is the most frequently used and carefully crafted by the ancients, it is also a symbol of the identity of the owner. Even now people use mahogany furniture is a manifestation of identity. Finally, the integrity of the furniture, classical furniture can be properly repaired, but the degree of repair can not be too large. There is no doubt that the classical furniture market is also a proliferation of counterfeits. Among them, the hardwood furniture that counterfeited the furniture of other woods began to appear in the middle of the Qing Dynasty. Even in the present rural areas, there are many furniture that continue the Ming style. Nowadays, the African rosewood is used to pretend to be a huanghuali, and the case of using the ebony-like rosewood is the most headache for collectors. It is understandable to make antique furniture according to the original production process, raw materials and styles. The crux of the problem is old-fashioned, and the current methods of doing so are too numerous to enumerate. Old furniture has been passed down for many years, and naturally it will leave a lot of time and traces of scrubbing. If you look at the furniture is old and old, the surface is very dirty, it is often new imitation, because expensive old furniture does not need to be deliberately done, these furniture is precious in history. The second is to carefully look at the process of the furniture surface, whether it is carving, seams, structure, every detail must be in place. The third is to have traces of real use, natural loss. For example, the places that are frequently in contact must be worn more, and the places that are not often touched are less worn, and now the old ones will make the furniture as a whole, and will not consider the use. The fourth is to look at the pulp. Of course, the theory is pale, the practice is fresh, and only by touching the physical things can we accumulate the correct experience.
CBN abrasive is mainly used for steel parts, such as high speed steel, die steel, 45 steel, etc., can be made into electroplating CBN, resin CBN, sintered CBN. Can be made into grinding wheel, cutting pieces, grinding head. Abrasive sharp, high temperature resistance, good thermal stability, wear resistance. The hardness of CBN is higher than that of ordinary abrasives and the ability to maintain shape is one of the main characteristics of high performance abrasives. CBN is very resistant to pressure. CBN has good thermal conductivity and can achieve cold cutting during grinding.
strong wear resistance, long life
The grinding ratio of CBN wheel can reach 3500-5500, which is 100 times higher than that of ordinary corundum wheel and 3-5 times higher than that of diamond wheel.
environmental protection, no pollution, energy saving and consumption reduction
No too much powder dust.
High work efficiency and good comprehensive economic benefits
The grinding is sharp, the grinding force is small, the dressing cycle of CBN wheel is long, the dressing amount is less, and the replacement time is long. Long service cycle, high grinding ratio, can obtain better economy, good shape retention in use, do not need to change and trim grinding wheel often, save working hours, improve working conditions, is conducive to machining operation.
Cubic boron nitride is not suitable for grinding hard metals and non-metallic materials. At high grinding temperature, CBN will react with alkaline aqueous solution. CBN grinding wheel will decompose in alkaline solution at 300℃, and can decompose in trace amount in boiling water, which will destroy the crystal shape of grinding grains. Therefore, oily coolant should be used instead of water-based coolant during grinding.
Cbn Cutting Discs,Flap Disc,Grinding Disc,Cbn Cutting Blade Henan Jinlun Superhard Material Co., Ltd , https://www.jinlunsuperhard.com
More than 80% of the market value of classical furniture is determined by its material.
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