Commercial names:

Kapur, keladan, Malaysian kapur, Sumatra kapur, Indonesian kapur.

Other names:

Borneo camphorwood (UK); kapoer (Indonesia); petanang (Malaya).

Distribution:

Malaysia, Indonesia, and South East Asia.

General description:

The timber is a uniform light to deep red-brown, with a camphor-like odour. It is straight grained to shallowly interlock with a fairly coarse but even texture and has resin filled continuous gum ducts in concentric lines. The weights vary between 790 kg/m3 (49  1b/ft3) and 700 kg/m3 (43  1b/ft3). The specific gravity averages at .77.

Mechanical properties:

This heavy density material has a high bending strength and crushing strength, with medium stiffness and shock resistant qualities. It has only a moderate steam bending classification and steaming produces resin exudation.

Seasoning:

It dries rather slowly but well with a slight tendency to cup and twist. It has a possibility of end splitting and surface checking in thicker material. There is medium movement.

Working properties:

The timber works well with both hand and machine tools with the effect of moderate blunting on cutting edges and severe blunting when interlocked grain is present. The material nails, screws, stains and polishes satisfactorily.

Durability:

The sapwood is liable to attack by powder post beetle and is permeable. The heartwood is very durable and incredibly resistant to preservative treatment.

Uses:

Blue stain may occur if timber is in contact with iron compounds in damp conditions. Its acidic character may allow corrosion in metals. The sapwood contains yellow colouring which may stain fabrics. It is excellent for external structural purposes such as: farm buildings, wharf decking and exterior joinery e.g. windows, doors and stairways. It is also used for plywood manufacture and selected logs for sliced decorative veneers for panelling.