Padauk

Padauk (Pterocarpus macrocarpus) is a heavy tropical hardwood cut from a large leguminous tree in the family Fabaceae, native to the seasonal forests of mainland Southeast Asia — Myanmar (where it is best known as Burma Padauk), Thailand, Laos, Cambodia and Vietnam. It is a close cousin of African padauk (P. soyauxii) and of the true rosewoods, and is one of the classic 'vermilion' timbers.

At a glance it is a dense, fine- to medium-textured wood with excellent natural luster and a strongly two-tone appearance: a sharply defined boundary between pale cream and a deep, saturated purple-maroon, exactly as seen on our sample. Freshly cut, the colored zone is a brilliant orange-red that darkens on exposure to the rich purple-brown captured here. The wood is stable in service and highly decay-resistant, which underpins its long use in fine furniture, flooring and turnery.

The color contrast is Padauk's signature. Our sample shows the classic sharp demarcation between a pale cream zone (the sapwood) and a deep purple-maroon zone — the colored heartwood, which is a vivid orange-red when first cut and oxidizes under light and air to the darker red-brown and purple-maroon tones seen here. Grain is generally straight to slightly interlocked, the texture fine to medium and even, and the surface has a good, faintly waxy luster. Distinct annual growth boundaries give the fine, ring-marked grain visible on the sample.

Padauk is dense — roughly 750–850 kg/m³ air-dry — with a Janka hardness of about 1,660 lbf, placing it firmly in the hard range, comparable to hard maple and above white oak. It is also strong and stiff for its weight and moves very little once seasoned.

The heartwood is rated very durable, with strong resistance to decay, fungi and insect (including termite) attack, so it holds up well in demanding interior and even sheltered exterior use. The pale sapwood is not durable and is clearly separable from the colored heartwood.

Padauk is a premium furniture and cabinetry timber, valued as much for its color as its strength. Typical uses include fine furniture, cabinetry, high-grade flooring and parquet, staircases, tool and knife handles, and decorative veneer and inlay. Its stability and durability also suit it to joinery, doors and boatbuilding.

It is a favorite of turners and carvers, cutting cleanly and taking crisp detail, and it appears in musical instruments — xylophone and marimba bars, drum shells, and guitar and other stringed-instrument components — where its density and tone are prized. Burl and figured stock (often sold under the name Maidou) is used for high-end veneer, boxes and small decorative work.

Padauk works well with both hand and machine tools. Its density causes some blunting of cutting edges, and slightly interlocked grain can tear on quartersawn faces, so sharp tooling and a reduced cutting angle help; otherwise it planes, turns and carves cleanly and takes a fine, lustrous polish straight off the tool. Pre-boring is sensible for nailing and screwing near ends.

It glues and finishes well, but two color cautions apply: the vivid orange-red darkens and dulls toward brown over time and with UV exposure, so a UV-inhibiting finish helps preserve tone; and the strong red-orange pigment can bleed into finishes, adjacent light woods and rags, so seal and mask carefully. The colored dust also stains skin, benches and clothing readily.

Dust cautions: Padauk is a recognized sensitizer. Its fine dust can cause skin, eye and respiratory irritation, and repeated exposure has been linked to asthma-like reactions and, in some workers, nausea — so use dust extraction, a respirator and good ventilation.

Padauk is a widely traded specialty hardwood, offered as lumber, turning blanks, flooring stock and veneer through exotic-hardwood dealers rather than general lumberyards. It sits in the mid price band for imported exotics — more than mahogany or sapele but well below the true rosewoods — with premiums for wide, clear boards and for figured or burl (Maidou) stock.

Sustainability status matters here: as of CITES CoP19 (in force February 2023) the entire genus Pterocarpus is listed under CITES Appendix II, so P. macrocarpus now requires CITES documentation for international trade. Buyers should ask for CITES paperwork and, where possible, choose responsibly sourced or FSC-certified material, since the species has been heavily logged across its range.