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OSSOKO (Scytopetalum klaineanum)
Trade Name
Ossoko
Scientific Name
Scytopetalum klaineanum Pierre
Family
SCYTOPETALACEAE
Common Names
Tokomion (Côte d`Ivoire); Soumien (Côte d`Ivoire); Moussangoue (Côte d`Ivoire); Mossahoue (Côte d`Ivoire); Fessouba (Côte d`Ivoire); Adjansi (Côte d`Ivoire); Ossoko
Description Of The Tree
Botanical Description
The bole is straight and cylindrical, may be up to 26 m in length. The trunk diameter attains 120 cm. It has medium sized buttresses, up to 2 m tall.
Natural Habitat
Natural Distribution
West Africa, in Cameroon, Gabon and in the Republic of the Congo.
Wood Identification
Anatomic Description Of Wood
Tyloses common. Vessels per mm2 less than 6 (rare). Multiple perforation plates. Vessel-ray pits larger than the intervessel pits. Apotracheal axial parenchyma diffuse and/or diffuse in aggregates. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. Heterogeneous rays and/or multiseriate heterogeneous rays.
Availability
Cites Status
Unrestricted
General Wood Description
Color
The heartwood is yellowish white, it is not demarcated.
COLOR INDEX (1=Black, 7=Light yellow,white)
4
Grain
Straight or slightly interlocked, sometimes with an influence on further processing operations.
Texture
Fine texture is reported in this species.
Luster
Luster is reported to be high.
Natural Durability
Not durable; important risks of decay attacks at any processing step, from logs up to final products. It must receive preservative treatment. Sensible to termites attack. The heartwood is sensible to Lyctus attacks.
Natural durability index (1= Very high durability, 7=Vey low durability)
5
Internal Growth Stresses
No growth stresses are reported in this species.
Silica Content
Silica Content: This timber is reported to have a negligible silica content. Silica contents over 0.05% may affect wood processing. Silica Value: 0.01
Resistance To Impregnation
Nearly impossible to treat with a too much low penetration of the preservative substances.
Wood Physical Properties
Basic Density or Specific Gravity (O.D. weight/vol. green) (g/cm³)
0.71
Air-dry Density (Weight and volume at 12%MC) (g/cm³)
0.80
Total shrinkage Tangential (Saturated to 0%MC) (%)
9.9
Total shrinkage Radial (Saturated to 0%MC) (%)
4.7
Drying Defects
Ease of Drying: Drying is rather slow and sometimes difficult to perform. 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-7
Dimensional stability ratio (Total Tangential Shrinkage %/Total Radial Shrinkage %)
2.1
Wood Chemical Properties
Wood Mechanical Properties
Bending Strength (MOR),12%MC (kgf/cm²)
1310
Stiffness (MOE) 12%MC (kgf/cm²)
199886
Compression parallel to fiber 12%MC (kgf/cm²)
595
Compression perpendicular to fiber 12%MC (kgf/cm²)
78
Shear strength radial 12%MC (kgf/cm²)
106
Janka hardness (side) 12%MC (kgf)
807
Janka hardness (end grain) 12%MC (kgf)
882
Workability
Sawing
Sawing of this species requires powerful equipment.
Rotary Veneer Cutting
Not suitable for veneering.
Sliced Veneer
Not suitable for veneering.
Blunting Effect
Slight blunting effect; ordinary tools can be used for sawing and machining.
Machining
It needs powerful tools for processing. Possible difficulties caused by interlocked grain are reported.
Planing
Easy; no particular problems.
Moulding
Moderately easy; tools must be cautiously sharpened.
Turning
30
Boring
Moderately easy; tools must be cautiously sharpened.
Mortising
Moderately easy; tools must be cautiously sharpened.
Nailing
Pre-boring is necessary.
Gluing
Glues well if basic gluing technical rules are followed.
Sanding
Easy to perform; it gives good results.
Polishing
Can be polished without surface preparation.
Response To Hand Tools
Working with hand tools is difficult.
REFERENCED USES
End Uses Summary
HOUSING GENERAL, joists, boards, frames, panelling, fittings, shutter boards, FURNITURE AND CABINETS, common furniture, TURNING, ornaments, turned furniture, PACKING, light packing, pallets, OTHER AND MUSICAL INSTRUMENTS, handicrafts, door core, coffin, moldings
General Housing
- 10 - Silica in Timbers
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
Frames
- 16 - Woods of the World
Paneling
- 18 - W3TROPICOS Missouri Botanical Garden
Fittings
- 19 - Silica in Timbers
Shutter Boards
- 20 - Prospect: The wood database
Furniture Cabinets
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Furniture, Common
- 23 - Handbook of Hardwoods
Turning
- 30 - Embassy of Honduras in Japan
Ornaments
- 31 - Embassy of Colombia in Japan
Turned Articles
- 32 - Embassy of Cote d`Ivoire in Japan
Packing
- 45 - Recopilación y Análisis de Estudios Tecnológicos de Maderas Peruanas
Light Packing
- 46 - ECUADOR, Inventario y Aprovechamiento de los Bosques del Sur Ecuatoriano
Pallets
- 48 - The strength properties of timbers
Handcraft
- 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
Door Cores
- 76 - Descripción General y Anatómica de 105 Maderas del Grupo Andino.
Coffin
- 78 - Amazonian Timbers for the International Market
Molding
- 79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão
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