The heartwood area is clearly visible, and the color of the heartwood is often varied depending on the place of origin. The heartwood of the novel material is light to dark olive green or nearly dark brown, which is converted to dark green by atmospheric oxidation, and is grayed to a simple colored stripe; light yellow. The growth wheel is slightly seen under the narrowing mirror. The porous material, the tube hole is blurred under the naked eye, and the irregular diameter, oblique column or curved column under the microscope is reduced, resulting in a beautiful flower color hole material. The tube hole of the heartwood is rich in dark brown or yellow-red gum-like deposits, and the sapwood tube has less deposits in the pores. In the longitudinal section, the heart tube hole and the yellow fiber layer cause yellow-black hairline-like fine lines, which are slightly similar to the vascular management of bamboo. The axial thin-walled tissue is slightly visible under the reduced mirror, and the main ring is tubular. The wood ray is visible under the reduced mirror, slightly dense to dense, very fine to very fine. Wave marks and intercellular channels were not seen. Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â
 Under the microscope, the cross-section of the tube hole is mostly irregular, with the main tube hole ( 4 ~ 7 cells), diameter, oblique column, single tube hole visible. Single perforation, inter-tube perforation. Axial thin-walled tissue is sparsely ring-shaped, star-shaped to star-scattered. Wood fiber wall thickness. Wood ray stacks, mostly 2 columns, visible in single row and pair of rows, 2 to 6 cells high , ray tissue in the same type and multiple columns, and rare III.
 The wood is very heavy, with a dry density of 1.15 to 1.25 g/cm3 , which is similar to the air-dry density of the same family ( Guaicum spp. ) ( 1.25 to 1.36 g/cm3 ), which is the heaviest wood known in the world. The wood texture is slanted or interwoven; the structure is dense and shiny, and it is oily and sexy, making it look noble and beautiful. The wood has a special fragrance and tastes bitter. The material is hard and brittle, and the processing is difficult, but the car spin performance is good, and it is easy to light. The heartwood is very resistant to corrosion, resistant to wood rot fungi, termites, marine bored plants, and sapwood slightly resistant to termites. Because the wood content is rich and hard, the heartwood anti-corrosion is extremely difficult. The shrinkage is large, the size is stable, and it is boring and difficult. It is most suitable as a propulsion equipment bushing and bearing for ships. It is also used as a textile equipment, sports stationary equipment, wooden poles, wooden wheels, various arts and crafts and toys.
Tags: wood-based panels, panels , top ten brands of Chinese plates , wood, sawn timber, logs
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