Jemerlang

INTRODUCTION

The common Malaysia name for the timber of Peltophorum spp. (Leguminosae). Vernacular names applied include jemerlang (Peninsular Malaysia) with various epithets, timbarayong (Sabah) and yellow flame (Peninsular Malaysia, Sabah and Sarawak). Major species include P. dasyrachis, P. pterocarpum and P. racemosum. The sapwood is light brown with a pink tinge, occasionally with light brown streaks and is moderately sharply defined from the heartwood, which is orange-red-brown, or purple-red-brown with dark zones, giving the timber a streaked appearance.

Also known as Tramkang and Treas (Cambodia); Iya-vakai (India); Soga (Indonesia); Phang and Sakham (Laos); Siar (Philippines); Nontri (Thailand); and Hoang linh and Lim xet (Vietnam).


DENSITY

The timber is moderately hard and moderately heavy with a density of 480-770 kg/m3 air dry.


TEXTURE

Texture is moderately coarse but even, with interlocked or slightly wavy grain.


MACHINING PROPERTIES

The timber is easy to resaw and cross-cut. Planing is easy and the planed surface is moderately smooth to smooth.


AIR DRYING

The timber dries slowly with slight cupping, bowing, end-checking, splitting and insect attacks as the main sources of degrade. 13 mm thick boards take approximately 5 months to air dry, while 38 mm thick boards take 6 months.


SHRINKAGE

Shrinkage is low, with radial shrinkage averaging 0.9% and tangential shrinkage averaging 1.1%.


USES

The timber is attractively streaked and is suitable for furniture manufacture, interior finishing, panelling, mouldings, partitioning, flooring, superior joinery and plywood.


REFERENCE

  1. Wong, T. M. 1982. A Dictionary of Malaysian Timbers. Revised by Lim, S. C. & Chung, R. C. K. Malayan Forest Record No. 30. Forest Research Institute Malaysia Kuala Lumpur. 201 pp.