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Ebony, also known as ebony, was called "black" or "ebony" in ancient times. It belongs to persimmon (Diospyros) and its heartwood is black. Persimmon tree species are distributed in tropical, subtropical and some temperate regions all over the world, and black heartwood is mainly produced in tropical Asia and Africa, such as India, Indonesia, Sri Lanka, Thailand, Myanmar, Vietnam, Cambodia and Laos. Madagascar, Congo. Gabon and other countries. China, Taiwan Province Province, Hainan, Yunnan and other places are also produced. As one of the famous materials of craft sculpture, musical instruments and furniture, ebony commercial materials are usually divided into the following two types in China: (1) heartwood black (pure black or slightly emerald green and irregular black heartwood (with bright and dark stripes or stripes), which is the light industry standard QB/T2385-98 "Dark and Precious Hardwood Furniture" (see standard appendix A2./kloc-0) (2) The classification of ebony (all uranium black) and striped ebony (black or chestnut brown with light black stripes in the middle) has passed the examination and approval of the national standard "Redwood". In traditional timber industry (such as national musical instrument manufacturing), ebony wood is customarily divided into ebony (rhinoceros), Lvmu (tea wood) and ebony (ebony). According to ancient records, "rhinoceros wood" is pure black. Very crisp: "tea black" is imported in the past, and its texture is solid, but it will sink in water; Ubuntu will be in the future, and Ubuntu will be rotten. In Japan, ebony wood is collectively referred to as ebony. According to the Nanyang Wood written by Miki Sudo, the difference (classification) of ebony is as follows: (1) ebony, and the heartwood color is pure black. (2) Striped ebony with black heartwood and gray or reddish brown stripes. (3) Green ebony, the heartwood is black, and the container is full of green substances with green stripes. (4) striped ebony, black and gray stripes, unable to weave marble wood and zebra wood. In China, people sometimes refer to D.fusca, D. african blackwood and ebony (disoproprosp) as ebony. Macroscopic characteristics of ebony commercial timber: the heartwood is obviously different, and the heartwood is black or chestnut brown. Porous wood. The growth ring is not obvious, and the tube hole is slightly seen at this moment (small to very small); Rich in inclusions (mostly containing dark gum). The axial thin structure is rich, which is mainly linear (tangential) in the concentric layer separation tube group. The wood rays are extremely thin, the radial marks are not obvious, and no chord marks can be seen. The wood sparkled. There is no special smell. The structure is thin and uniform, and the texture is usually slightly staggered. This material is hard and heavy. Corrosion resistance and durability. The air-dried density is greater than 0.85g/cm3, and it generally sinks into water. Main tree species of commercial timber: ebony (D.ebenum) and ebony (D.crassifcora), ebony (D.pilosantnera), ebony (D.melanoxylon), ebony (Dcelebica), ebony (Dtomentosa) and ebony (D. D. Mont) in East India. The natural variation of celestial bodies in ancient Sichuan is that from 2000 to 10000 years ago, all plants and creatures on the ground were buried in low-lying places such as ancient river beds by earthquakes, floods and mudslides. Some trees buried in the soil are formed by carbonization for thousands or even tens of thousands of years under the conditions of hypoxia and high pressure and under the action of microorganisms such as bacteria, so they are also called "carbonized wood". News _ Content "