It is believed that everyone has heard about wood such as gloomy wood in the Redwood Market and the news website introducing wood. So what is gloomy wood ? How is the dark wood formed? Gloomy wood how to identify true and false? What is the price of gloomy wood? Then let's let American Life Xiaobian introduce some dreary wood related issues to everyone with a question of what is gloomy wood !
What is gloomy wood? The value of gloomy wood
Gloomy wood, Sichuan people call it ebony, it is from 3,000 to 10,000 years ago, ancient Sichuan geographical celestial body natural variation, by the earthquake, flooding, debris flow will ground plant biology and other buried in the ancient riverbed and other low-lying. Some of the trees buried in silt are formed under carbonization process of thousands or even tens of thousands of years under the action of microorganisms such as hypoxia, high pressure, bacteria, etc. Therefore, they are also called “carbonized woodâ€.
Strictly speaking, gloomy wood has gone beyond the scope of wood, and should be classified as "treasures." This is because at the “Jin Bao Yuan†of the National Palace Museum, there is a wonderful work of art that is carved out of dark wood. It can be seen that its preciousness is far beyond the reach of ordinary wood. Gloomy wood furniture and arts can be said to be unrivalled in terms of their texture, cultural value and prospects for appreciation, even exceeding the precious rosewood.
Gloomy wood is rare in the world, but it can compete with Zhu Yu. "The quagmire does not damage the cheekbones and enter the Huateng light clothing." Because of its sparse number, low yield, non-renewable, and highly ornamental value, it has extremely high research value, cultural value and economic added value. Utilizing the unique material of the gloomy wood, the furniture and artwork of the ancient Austrian charm and various artistic forms are highly integrated works of nature and culture, which are highly appreciated and collected.
How to identify the dark wood
Identification method
Gloomy wood is a genus of charred wood, so it is mostly black and carbonized, its carbonized appearance is similar to that of coke that has been grilled, and it is carbonized and cracked; painting with dark wood does not produce black scratches on white paper; experienced The master generally evaluates the overall age and possible formation of tree species from the degree of appearance carbonization, the condition of the cross-section after grinding, the feel, etc., to determine whether it is gloomy wood; completely into the gloomy wooden level of the trees, at least to go through thousands of years of time Oxidative carbonization; insufficient carbonization is sometimes referred to as water sinking wood, and water sinking wood is only formed during underwater decomposing for many years, and does not have some formation conditions under anoxic and high pressure conditions.
Identification method 2
Gloomy hard wood, mostly brownish black, black red, gold, yellow brown. Gloomy wood section smooth, delicate wood grain, polished to achieve a mirror light, some ebony nature is similar to rosewood, never fade, not decay, no insects, is the production of art, antique furniture, the ideal material. In the overcast wood, the hardest wood is the hardest, and the reddish dark wood is softer; the gloomy wood formed by it can sink and float after being dried naturally, which depends on its forming tree species; in particular, some finished small pieces are generally It floats on the surface of the water, so it is not possible to identify whether it is a dark wood by submerging.
Identification method 3
Sulky wood is more peculiar than ordinary wood. Generally, wood burns white ash, and gloomy wood burns yellow ash, and the color of water will be deepened, and the water will be restored to its true color. When painted with a bit of vegetable oil, it will change. Black and bright, will not fade. When most of the gloomy trees are unearthed, the tree core has decayed, leaving only the tree heads and the middle of the trunk; the heavily carbonized surface cannot be used as a general material. Usually, the outer layer is required to be shaved, leaving the wooden heart to use.
Identification method four
There are a wide variety of trees that form gloomy wood, including Malus cherngii, Cyclobalanopsis glabra, Fragrant eucalyptus, Phoebe, red eucalyptus, Taxus chinensis, Marshmallow, yellow willow, Cork, eucalyptus, sandalwood, etc. There are five kinds of bar, muliu, camphor, red peony, and nanmu. In general, trees with scent and bactericidal characteristics can form gloomy wood, but not all gloomy woods that have been formed have scent. This depends on the species of the tree to be formed, and it is determined whether it is scented or not. Usually the gloomy wood formed by nanmu has fragrance.
Gloomy wood prices
The formation time of gloomy wood ranges from 3000 to 8000, but it is not enough to become a plant fossil. However, it does not belong to minerals. Sulky wood is generally only small crafts, its value is affected by a variety of factors, must be considered in all directions, generally 2000-8 million yuan / ton, there is no specific standard for processing into art. Due to the different types of gloomy trees, their market values ​​are different. The gloomy wood formed by Phoebe genus of Phoebe is the most expensive and can be as high as 8,000 to 100,000 yuan per cubic meter. The older the age, the better the gloomy preservation is. The higher the price of wood.
About the gloomy wood and dignified wood identification methods are introduced here, and we hope to help everyone. For more information on wood, please pay attention to the GO Home Information Channel.
Black metal industry standard of the People's Republic of China: Ultra High Power Graphite Electrode (YB/T 4090-2000) "regulation of the ultra High Power Graphite Electrode shape, size and allow deviation, technical requirements, test methods, inspection rule, packing, marking, storage, transportation and quality certificate. It is applicable to high - power Graphite Electrode, which is made of high quality needle coke as the main raw material, which is made of molding, roasting, impregnating, graphitization and machining.
Graphite is very common in nature, and graphene is the intensity of the highest substance known to mankind, but scientists could still take several years or even decades, to find a way to graphite into a large high quality graphene "thin film" method, thus they can be used to manufacture all kinds of useful material for mankind. According to scientists, graphene in addition to very strong, but also has a series of unique features, graphene or conductive performance of the best known materials, which makes it also has great potential applications in the field of microelectronics. The researchers even see graphene as a substitute for silicon that can be used to produce future supercomputers.
superiority
1: the increasing complexity of the geometry of the mould and the diversification of the product application result in the higher and higher demand for the discharge accuracy of the spark machine. The advantage of graphite electrode is that it is easy to process, high removal rate and low graphite loss. Therefore, some of the group spark machine customers have abandoned copper electrode instead of graphite electrode. In addition, some special shaped electrode can't made of copper, but easier to forming, graphite and copper electrode is heavier, not suitable for processing large electrode, these factors have caused part of the group of the graphite electrode spark machine customer applications.
2. Graphite electrode is easier to process, and the machining speed is obviously faster than that of copper electrode. For example, graphite is processed by milling process, and its processing speed is 2~3 times faster than that of other metals, and no additional manual processing is required, while the copper electrode needs to be worn by hand. Similarly, if you use a high speed graphite processing center to make the electrode, it will be faster, more efficient, and will not produce dust problems. In these processes, selecting the right tools and graphite can reduce the abrasion loss of the cutter and the breakage of the copper gong. If the concrete is the milling time of graphite electrode copper electrode and graphite electrode, graphite 67% faster than copper electrode, in the general case of electro discharge machining, the adoption of graphite electrode machining 58% faster than using copper electrode. In this way, the processing time is greatly reduced and the manufacturing costs are reduced.
3: the graphite electrode is different from the traditional copper electrode design. Many mold factory in copper electrode roughing and finishing usually have different requirements, and graphite electrode is used almost the same amount of reserve, this reduces the CAD/CAM and the frequency of machine, sheet is for this reason, to a large extent is enough to improve the precision of the mold cavity.
Of course, the first thing that should be clear is how to use graphite materials and other related factors after the copper electrode is transferred to graphite electrode. Today, some group spark machine customers use graphite for electrode discharge machining, which is exempt from the process of mold cavity polishing and chemical polishing, but still achieve the desired surface finish. If the process of time and polishing is not increased, it is impossible for the copper electrode to produce such an artifact. In addition, the graphite is divided into different levels, and in particular the application of using the appropriate level of graphite and spark discharge parameters to achieve the ideal processing effect, if in the use of graphite electrode spark machine operators use the same as the copper electrode parameters, then the result is certainly disappointing. If the material of the electrode is strictly controlled, the graphite electrode can be used in the non-loss condition (less than 1%), but the copper electrode is not used.
Ultra High Power Graphite Electrode
Ultra High Power Graphite Electrode,Conductive Graphite,Mesh Graphite Electrode,Special Graphite Electrodes
Fengcheng Ruixing Carbon Products Co., Ltd , http://www.lnfcrxts.com