Distribution: The
natural growth range of the species is reported to be the
open forests of Zaire, Cameroon, Gabon, the southern regions
of Tanzania, and Mozambique. It is also found in the swampy
forests of the Congo region.
General Characteristics: The
tree is described as medium sized, and attains a height
of 50 to 60 feet (15 to 18 m) and a trunk diameter of 30
to 36 inches (75 to 100 cm). The heartwood is dark brown,
mostly black, with fine, closely spaced, very dark veins
and white lines. The combination of white bands against
the dark wood with black streaks gives Wenge a very attractive
appearance. Color variation between boards is reported
to be moderate; the sapwood is pale yellow or whitish in
color, and is clearly demarcated from the heartwood. Texture
is typically medium to coarse; the grain is fairly straight
to slightly roey. The appearance of the wood has been described
as expressive; Luster is reported to be low. There is no
distinctive odor or taste.
Weight: Basic specific gravity
(ovendry weight/green volume) N/A; air-dry density 54 pcf.
Working Properties: The
timber is reported to saw slowly. The timber is reported
to be fairly easy to work with machine tools. Wenge is
reported to be popular as a good turnery wood. The material
is reported to be rather difficult to glue because of the
presence of resin cells. The timber is described as tough
and strong, and requires pre-boring in nailing, but holding
characteristics are reported to be good. Sanding characteristics
are reported to be satisfactory.
The wood is reported to be rather difficult to polish,
but satisfactory polishing results can be obtained after
filling. Varnishing properties are reported to be rather
poor. Some solvent-based stains are reported to dry with
difficulty. The wood responds well to hand tools.
Durability: The heartwood
is reported to be durable and is resistant to termites.
Preservation: The heartwood
is reported to be highly resistant to preservative treatment
but the sapwood is treatable.
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