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Kapur
Dryobalanops lanceolata Burck
Dipterocarpaceae
Kapoer (Netherlands); Kapur (Sabah); Indonesische kapur (Germany); Kapur (Sarawak); Oost-Borneo kamfer (Netherlands); Indonesisk kapur (Sweden); Capur indonesiano (Italy); Capur indonesiano (Spain); Swamp kapur (Sabah); Borneo camphorwood paigie (Sabah); Kapur (Malaysia); Capur d`Indonesia (France); Kapur-kejatan (Malaysia); Petanang (Indonesia); Kapur tanduk (Indonesia); Indonesian kapur (United States of America); Keladan (Malaysia); Indonesian kapur (United Kingdom)
This camphor tree is very large, occasionally up to 75 m tall, with a straight bole, branchless for 35 m or more, and having a diameter of up to145 cm and buttresses of up to 4 m high and 3 m long.
Dryobalanops lanceolata is the tallest recorded dipterocarp tree. Kapur timber fetches the highest prices in Borneo and the species is also a major source of Borneo camphor. It grows on fertile clayey soils up to 800 m of altitude.
Brittle heart is occasionally reported for this species. It contains chemicals that discolor ferrous metals when damp.
Wood diffuse porous. Vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 200 micras or more (large). Tyloses common. Vestured pits. Vessel-ray pits reticulate and/or foraminate. Vascular/vasicentric tracheides present. Simple perforatio Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Paratracheal axial parenchyma scanty and/or vasicentric. Axial parenchyma aliform. Rays storied. Silica bodies in the ray cells. Body ray cells procumbent with mostly 2 to 4 rows of upright and/or square marginal cells (Kribs-II). Fibers with distinctly bordered pits.
Unrestricted
The odor resembles camphor, particularly D. aromatica.
The sapwood varies from light yellowish brown to pale pink. The heartwood is rose red to dark reddish brown.
5
It is mostly straight, rarely deep interlocking, occasional brittle heart in the innermost heart.
The texture varies from moderately coarse to coarse.
The planed surfaces are not particularly lustrous.
It is resistant to fungi, when fresh it is vulnerable to insects.
3
The heartwood is resistant to impregnation with preservatives, even under pressure. The sapwood is permeable to preservatives.
0.69
0.78
9.2
3.6
Drying Defects: There is a moderate risk of splitting, insect attack and staining, and a slight risk of cupping, bowing and end-checking.
UK-H; JP-6; US-T10-D4S
2.6
993
160965
615
47
When green, the timber is easy to saw. Dry timber is less easy to saw because of the presence of silica. Cross cutting is generally easy.
It is good for peeling if well steamed, but resin problems.
It is good for peeling if well steamed, but resin problems.
Saw-teeth may become clogged by resin.
Machining operations are easy to fair.
Planing is reported to be easy.
Boring is reported to be easy.
Needs pre-bore for nailing. Screws well.
Resin exudation causes gluing problems, urea glues recommended.
Finishing of this species is reportedly difficult. It needs filling.
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