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Ebony species and their wood characteristics (GB / T 18107-2017)

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Mahogany GB / T 18107-2017   ? Appendix I →   Ebony species and their wood characteristics

Appendix I (informative)
Ebony species and their wood characteristics

Sulawesi ebony, Philippine ebony and maoyao ebony

1. Diospyros celebica bakh, ebony, Sulawesi

Foreign trade name :Macassar ebony

Trees and distribution : arbor, up to 40 m in height and 1.0 m in DBH. The main products are Indonesia.

Macroscopic structural features Porous wood Sapwood is reddish brown, which is obviously different from heartwood. Heartwood black or chestnut brown, with dark and light stripes. The growth ring is not obvious. The number of tube holes is slightly less than that of the naked eye. The axial parenchyma was abundant and disappeared under the magnifying glass. It can be seen under a wood ray magnifying glass. No ripple was found under magnifying glass. No aroma; The structure is fine; The texture is usually until slightly interlaced (Fig. I.1).

 Wood macrostructure of Sulawesi ebony

Figure I.1 photos of wood macrostructure

Microstructure characteristics catheter Most of them are single tube holes, and a few of them are multiple pipe holes (mostly 2-3); 5 / mm ²~ 17 / mm ²; With gum, the maximum tangential diameter is 179 µ m. Average 118 µ m。 The pitting between the tubes was in a row; Single perforation, the pit type between the catheter and the ray is similar to that between the tube and the ray. Axial parenchyma It was banded (1-2 cells wide, most of 1 cell, intersected with wood rays, and the network was obvious); A few are sparse and tubular; No crystal was found. Wood fiber Wall thickness. Wood ray 13 pieces / mm ~ 17 pieces / mm; Non overlapping. Single row rays (sparse 2 columns, even 3 columns), 1 ~ 32 cells (more than 10 ~ 20) cells, ray tissue heteromorphic single row (Fig. I.2). Some of the ray cells contain dark gum and whiplash crystals.

 Wood microstructure of Sulawesi ebony

Figure I.2 photos of wood microstructure

Air dry density (12% water content) : About 1.09 g / cm ³。

Specimen material : cafw14116 (Indonesia).


1. Diospyros philippinensis A.DC

Foreign trade name :Kamagong ebony

Trees and distribution : arbor, mainly produced in the Philippines, Sri Lanka, Taiwan, China.

Macroscopic structural features Porous wood Sapwood It is light reddish brown, which is obviously different from heartwood. Heartwood Black, black or chestnut brown, with dark and light stripes. Growth ring Not obvious. Tube hole Under the magnifying glass, the number is very small, at least. Axial parenchyma It's not under the magnifying glass. Wood ray Under the magnifying glass, it is very narrow. Ripple mark No. No aroma; The structure is very fine; The texture is usually until slightly interlaced (Fig. I.3).

 Macrostructure of Filipino Ebony Wood

Figure I.3 photos of wood macrostructure

Microstructure characteristics catheter There are mainly single tube holes and a few multiple tube holes (mostly 2-4), scattered; 2 / mm ²~ 8 / mm ²; It contains black or black brown gum with a maximum tangential diameter of 182 µ m. Average 98 µ m。 There is a mutual benefit of pit type between tubes; Single perforation, the pit type between the catheter and the ray is similar to that between the tube and the ray. Axial parenchyma It is banded (most of them are 1 cell wide, intersecting with wood rays, and the network is obvious). Wood fiber Wall thickness. Wood ray 12 pieces / mm ~ 15 pieces / mm; Non overlapping. Single row rays (even 2 rows), 3-15 cells high, and heterotypic and uniserial ray tissues (Fig. I.4). Most of the ray cells contain dark gum and whiplash crystals.

 Microstructure of Filipino Ebony Wood

Figure I.4 photos of wood microstructure

Air dry density (12% water content) :0。 seventy-eight   g/cm ³~ 1.09 g/cm ³。

Specimen material : cafw4641 (Philippines), cafw18334 (Philippines), cafw11194 (Taiwan, China).


1. 3. Diospyros pilosanthera Blanco

Foreign trade name :Bolong-eta

Trees and distribution : arbor, up to 35 m high, mainly produced in the Philippines.

Macroscopic structural features Porous wood Heartwood black or chestnut brown, with deep and light stripes. The growth ring is not obvious. The number of tube holes is small. Axial parenchyma is abundant, which can be seen under the magnifying glass, mainly strip-shaped and sparse ring-shaped. It can be seen under a wood ray magnifying glass. There is no ripple mark. The aroma is absent, the structure is fine, and the texture is usually till slightly interlaced (Fig. I.5).

 Macrostructure of the wood of the Chinese medicine ebony

Figure I.5 photos of wood macrostructure

Microstructure characteristics catheter Most of them are single tube holes, and a few of them are multiple pipe holes (mostly 2-3); 3 / mm ²~ 4 / mm ²; It contains black or black brown gum, and the tangential diameter of the tube hole is 132 µ m~200 µ m. Average 137 µ m。 The pitting between the tubes was in a row; Single perforation, the pit type between the catheter and the ray is similar to that between the tube and the ray. Axial parenchyma It is banded (most of them are 1 cell wide and intersect with wood rays, and the network is obvious); The number of tubular rings is less. Wood fiber Wall thickness. Wood ray 15 pieces / mm ~ 20 pieces / mm; Non overlapping. Single row radiation (even 2 rows), 3 ~ 17 cells high, and heterotypic and uniserial ray tissue (Fig. I.6). Most ray cells contain dark gum and rhomboid crystals.

 Wood microstructure of Aconitum chinense

Figure I.6 photos of wood microstructure

Air dry density (12% water content) :0.90 g/cm ³~ 0.97 g/cm ³。

Specimen material : cafw4619 (Philippines), cafw21064 (Indonesia).