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Cumaru


 
     Description:

Source of wood: South America
Latin name: Dipteryx sp
Foreign name: Cumaru, Tonka bean.
Trees and distribution: large trees, 22-48 m high, trunk straight, smooth, 18-24 m high under branches, DBH about 30-80 cm;
Wood Origin: Mainly in South America.
Wood characteristics:
Wood is loose porous wood. Heart sapwood is distinct; heartwood is yellow-brown to light reddish-brown, often striped; sapwood is yellow-white, 2-4 cm thick. The growth ring is slightly obvious. The holes are visible to the naked eye and scattered. Axial parenchyma is evident under magnifying glass, with wing, poly-wing and rim-like structures. Wood rays are visible under a magnifying glass. The ripple mark was not visible and the intercellular tract was not visible. Wood glossy; wet wood has vanilla-like odor or stench, no special taste; waxy and oily texture. The texture is interlaced even; the structure is fine and slightly uniform.
Wood properties:
Dry shrinkage is very large; the total dry shrinkage rate is 7.6% - 8.3% in chord direction and 5.0% - 5.1% in radial direction. Wood dimensional stability is excellent to medium. Wood is very heavy; basic density is 0.91-0.97g/cm3, air-dry density is 1.07-1.11g/cm3; high strength, along-grain compressive strength 97-111 MPa, flexural strength 173-293 MPa, flexural elastic modulus 17.9-22.0 GPa. The nail holds well. In order to prevent wood cracking, pre-drilling should be done before nailing. 

Drying should be slow, otherwise thick plates have cracks. It is difficult to process, because the wood is hard and the tool edge is blunt, it is suitable to use alloy steel saw blade; if the wood texture is staggered, the cutting angle should be 15-20 degrees; the cutting surface is smooth; after applying filler, the finishing is good, and the adhesive should be carefully operated.
Dragon-phoenix sandalwood, with hard wood, distinct texture, like dragon and phoenix, has a variety of forms, interesting and interesting. It is a beautiful symbol, stable color, ** elegant.
Wood uses:
The air-dry density is 1.07-1.11g/cm3. Wood has luster, heavy or very hard material, corrosion resistance, wear resistance, termite resistance, beautiful texture, more uniform, high strength, pleasant color. It is an excellent material for high-grade floor, furniture and interior decoration. Longfeng sandalwood is widely used to make flooring, furniture and so on, adapting to China's coastal areas and humid environment.
Especially suitable for high-end flooring, most brands have sandalwood flooring, such as dragon like phoenix, variety, interesting.
Advantages of Longfeng Sandalwood
Hard wood, with distinct texture, like dragons and phoenixes, with various forms and interesting, is a beautiful symbol, calm and elegant color.
Dragon and Phoenix Sandalwood Shortcomings
Because the wood density is higher and the material is harder, it is easy to appear dark cracks at both ends of the floor. The bright paint will make the dark cracks obvious. If wear-resistant matte light technology is used, the dark cracks are not obvious and the dark cracks are concealed between them.


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