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Kapur
Dryobalanops sumatrensis (J.F. Gmelin) Kosterm.
Dipterocarpaceae
Telajin; Malayan kapur; Kapur ranggi; Kapur peringgi; Kapur bukit; Kapur biasa; Kapor; Kajoe kapoer; Hajoe hapoer; Borneo camphorwood; Anggi; Kapur barus (Sabah); Kapur (Indonesia); Kapur-kejatan (Malaysia); Indonesian kapur (United Kingdom); Indonesian kapur (United States of America); Capur d`Indonesia (France); Petanang (Indonesia); Oost-Borneo kamfer (Netherlands); Capur indonesiano (Italy); Borneo camphorwood paigie (Sabah); Swamp kapur (Sabah); Keladan (Malaysia); Kapur singkel (Indonesia); Kapur (Sarawak); Indonesisk kapur (Sweden); Kapoer (Netherlands); Indonesische kapur (Germany); Kapur (Malaysia); Kapur (Sabah); Capur indonesiano (Spain)
Dryobalanops camphora Colebr.; Dryobalanops aromatica Gaertn.
This camphor tree is large, growing up to 60 m tall, with a straight and cylindrical bole, branchless for 40 m. Diameters up to 200 cm are reported, it presents buttresses up to 5 m high.
It is a very large gregarious tree, which provides most of the kapur timber and camphor for Peninsular Malaysia and Sumatra. Dryobalanops sumatrensis prefers well drained leached sandy and clayey soils, growing up to 400 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, but no taste.
The sapwood varies from light yellowish brown to pale pink. The heartwood is rose red to dark reddish brown.
4
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 reported to be resistant to preservative treatment, but the sapwood is readily treatable.
0.69
0.77
9.6
4.4
Ease of Drying: Air seasoning is moderately fast.
JP-6; UK-E; US-T10-D4S
2.2
1249
179110
649
56
119
567
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 it has resin problems.
It is good for peeling if well steamed, but it has resin problems.
Saw-teeth may become clogged by resin.
The response of this species to machining operations is good to fair.
Planing is reported to be easy.
Boring operations are rather easy.
Needs pre-bore for nailing. Screws well.
Resin exudation causes gluing problems, urea glues recommended.
This species has a fair behavior in finishing. It needs filling.
It does not take a high polish without some filling.
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