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PADOUK D`AFRIQUE (Pterocarpus tinctorius)

Trade Name

Padouk d`Afrique

Scientific Name

Pterocarpus tinctorius Welw.

Family

LEGUMINOSAE

Common Names

Paduk (Italy); Padoek (Netherlands); Padouk (Germany); Barwood (United Kingdom); Camwood (United Kingdom); African Padauk (United Kingdom); Padauk (United Kingdom); Corail (Belgium); Mongola (Zaire); Mukula (Zaire); N`gula (Zaire); Kisese (Congo); Mbel (Gabon); Mbel (Cameroon); Osun (Nigeria); Nkula (Zaire); Tacula (Angola); Palo rojo (Equatorial Guinea)

Scientific Name Synonyms

Pterocarpus zimmermannii Harms; Pterocarpus velutinus De Wild.; Pterocarpus tinctorius var. macrophyllus Welw. ex Baker; Pterocarpus tinctorius var. odoratus (De Wild.) Hauman; Pterocarpus tinctorius var. chrysothrix (Taub.) Hauman; Pterocarpus odoratus De Wild.; Pterocarpus megalocarpus Harms; Pterocarpus kaessneri Harms; Pterocarpus holtzii Harms; Pterocarpus hockii De Wild.; Pterocarpus delevoyi De Wild.; Pterocarpus chrysothrix Taub.; Pterocarpus cabrae De Wild.; Pterocarpus albopubescens Hauman; Lingoum tinctorium (Welw.) Kuntze

Description Of The Tree

Botanical Description

The bole is usually straight and cylindrical, up to 15 m long. It presents low buttresses or no buttresses at all. Log is banned for international trading.(Cameroon)

Natural Habitat

Pterocarpus tinctorius occurs in riparian forests, secondary formations and grass savanna.

Wood Identification

Anatomic Description Of Wood

Vessels per mm2 less than 6 (rare). Wood diffuse porous. Occasionally vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 200 micras or more (large). Vestured pits. Simple perforation plates. Intervessel pits large, 10 micras or more. Paratracheal axial parenchyma scanty and/or vasicentric. Axial parenchyma aliform. Axial parenchyma confluent. Axial parenchyma in marginal or in seemingly marginal bands. Prismatic crystals in short chains in chambered axial parenchyma cells. Two cells per pa Rays exclusively uniseriate. Non-crystals in ray cells. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Non-septate fibers. Fibers with simple to minutely bordered pits.

  • Wood Macro Photo Tangential Plane
  • Wood Micro Photo Of Transversal Section

Availability

Cites Status

Unrestricted

General Wood Description

COLOR INDEX (1=Black, 7=Light yellow,white)

2

Grain

Wavy; special care is needed when machining in order to obtain satisfying quality surface.

Texture

The wood is mostly coarse in texture.

Luster

The wood luster is reported to be rather low.

Natural Durability

Moderately durable to decay. Without preservative treatment, this species can be used only under risk of occasional re-humidification. It is not suited for uses with risks of permanent or long-lasting humidification. Resistant to termites attacks.

Natural durability index (1= Very high durability, 7=Vey low durability)

1

Internal Growth Stresses

No residual stresses are reported in this species.

Silica Content

Silica Content: Negligible content of silica is reported. Amounts over 0.05% may affect wood processing. Silica Value: 0

Resistance To Impregnation

Difficult to treat with only a low penetration of the preservative products.

Wood Physical Properties

Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)

0.80

Air-dry Density (Weight and volume at 12%MC) (g/cm³)

0.92

Total shrinkage Tangential (Saturated to 0%MC) (%)

5.2

Total shrinkage Radial (Saturated to 0%MC) (%)

3.3

Drying Defects

Ease of Drying: Drying is very slow and difficult to perform; defects are frequent. Drying Defects: Risks of distortions. Kiln Schedules: Schedule proposed as a reference by comparison with well known species taking into account to the general technological behavior of this species.

Recommended Dry Kiln Schedule

FR-4

Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)

1.6

Wood Chemical Properties

Wood Mechanical Properties

Bending Strength (MOR),12%MC (kgf/cm²)

1064

Stiffness (MOE) 12%MC (kgf/cm²)

190955

Compression parallel to fiber 12%MC (kgf/cm²)

795

Compression perpendicular to fiber 12%MC (kgf/cm²)

115

Shear strength radial 12%MC (kgf/cm²)

52

Janka hardness (side) 12%MC (kgf)

1063

Janka hardness (end grain) 12%MC (kgf)

1098

Workability

Rotary Veneer Cutting

Suitable for slicing.

Sliced Veneer

Suitable for slicing.

Blunting Effect

Moderate blunting effect; stellited blades for sawing and carbide tools for machining are advised.

Planing

Moderately easy; tools must be cautiously sharpened.

Moulding

Easy; no particular problems.

Turning

30

Boring

Easy; no particular problems.

Mortising

Easy; no particular problems.

Nailing

Pre-boring is necessary.

Gluing

Difficult to glue because of the extracts content.

Sanding

Easy to perform; it gives good results.

Polishing

Needs pre-coating.

REFERENCED USES

End Uses Summary

HOUSING GENERAL, beams, joists, boards, flooring, parquet, frames, steps, panelling, fittings, FURNITURE AND CABINETS, luxury furniture, cabinets, PLYWOOD AND VENEER, Decorative veneer, TURNING, ornaments, turned furniture, cutlery, lasts, CONTAINERS, truck bodies, truck flooring, NAVAL CONSTRUCTION, boats, boat hulls, boat deck, port storage, OTHER AND MUSICAL INSTRUMENTS, handicrafts

General Housing
  • 10 - Silica in Timbers
Beams
  • 11 - Prospect: The wood database
Joists
  • 12 - Tropical timbers of the world. Part I-Tropical American Species
Boards
  • 13 - Dry kiln schedules for commercial woods. Temperate and tropical. Section III. Latin American (Mexico, Central, and South America) Woods–Conventional Temperatures
Flooring
  • 14 - Handbook of Hardwoods
Parquet
  • 15 - Empire Timbers
Frames
  • 16 - Woods of the World
Steps
  • 17 - Tree Conservation Database
Paneling
  • 18 - W3TROPICOS Missouri Botanical Garden
Fittings
  • 19 - Silica in Timbers
Furniture Cabinets
  • 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Furniture, Luxury
  • 22 - Dry kiln schedules for commercial woods. Temperate and tropical. Section IV-Asian and Oceanian Woods
Cabinet
  • 24 - Empire Timbers
Panels, Veneers
  • 25 - Directory of Timber Trade Malaysia
Decorative veneer
  • 28 - Ministry of Agriculture, Fisheries & Forest of Fiji
Turning
  • 30 - Embassy of Honduras in Japan
Ornaments
  • 31 - Embassy of Colombia in Japan
Turned Articles
  • 32 - Embassy of Cote d`Ivoire in Japan
Knife Handles
  • 33 - Embassy of Gabon in Japan
Lasts
  • 34 - Embassy of Indonesia in Japan
Truck Body
  • 53 - Timbers of the New World
Truck Flooring
  • 54 - Bulletin of the Government Forest Experiment Station N.157: Identification of Tropical Woods
Shipbuilding
  • 55 - Tropical Timber Atlas of Latin America
Boats
  • 56 - Manual de Identificación de Especies Forestales de la Subregión Andina.
Boat Hulls
  • 57 - Estadísticas de Aprovechamiento, Exportación y comercialización Nacional de Productos Forestales
Boat Decking
  • 59 - Programa Nacional de uso Sostenible de los Bosques e Incremento a las Exportaciones.
Port Storage
  • 62 - Estudio Tecnológico de Maderas del Perú (Zona Pucallpa) Vol I
Handcraft
  • 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)

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