RENGAS
Family: Anacardiaceae

Other Names:
Borneo rosewood, Straight mahogany, black varnish tree (UK).

Distribution:
Malaysia, Philippines and Papua New Guinea.

General Description:
The rays have horizontal canals which exude sap which forms black blotches on the wood surface; these disappear when the wood is planed.

Color:
A rich vivid red, with variegated streaks.

Weight:
Varies from 670-990 kg/m3 (41-61 lb/ft3).

Specific Gravity:
.83.

Mechanical Properties:
•  Bending strength – Low
•  Crushing strength – Low
•  Resistance to shocl loads – Low
•  Stiffness – Low
•  Steam bending classification – Poor

Seasoning:
Dries easily and well with little degrade. There is very small movement in service.

Working properties:
It works reasonably well with hand and machine tools, but has a blunting effect on tools which need to be kept sharpened. The interlocked grain may tear in planing unless a reduced cutting angle is used. It nails, screws, glues and takes stain and polish well. The sanding dust can cause irritation to the skin.

Durability:
Moderately durable, and resistant to preservation treatment.

Uses:
•  Cabinet making
•  Ornamental work
•  Furniture and superior joinery
•  Selected logs are sliced for veneers