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AKOSSIKA (Scottellia klaineana)

Trade Name

Akossika

Scientific Name

Scottellia klaineana Pierre

Family

FLACOURTIACEAE

Common Names

Odoko (Nigeria); Korokon (Liberia); Kruku (Ghana); Akossika (Côte d`Ivoire); Odoko (Italy); Odoko (United Kingdom); Odoko (Germany); Ngobisolo (Cameroon); Akossika

Scientific Name Synonyms

Scottellia kamerunensis Gilg; Scottellia coriacea A. Chev. ex Hutch. & Dalz.; Scottellia chevalieri Chipp

Description Of The Tree

Botanical Description

The tree reaches a height of 23 to 50 m. The bole is straight, but not always cylindrical. The trunk diameter attains 50 to 120 cm.

Natural Habitat

Scottellia klaineana is found in evergreen rain forests, often in small stands and along banks of streams.

Natural Distribution

West Africa from Liberia to southern Nigeria.

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Wood Identification

Anatomic Description Of Wood

Wood diffuse porous. Vessels in radial multiples of 2 to 4. Tangential diameter of vessel lumina 100 micras or less (very small). Non-vestured pits. Vessels per mm2 more than 20 (very abundant). Scalariform perforation plates with 5 to 15 bars. Vessel-ray pits Axial parenchyma absent or extremely rare, non visible with magnifying glass (8x). 4 to 10 rays per mm (medium). Rays non-storied. Larger rays more than 4 seriate. Prismatic crystals in the ray cells. Heterogeneous rays and/or multiseriate heterogeneous rays. Septate fibers present. 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

The heartwood is pale yellow to brownish yellow, it is not demarcated. The silver figure is fine.

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

5

Grain

Straight or slightly interlocked, sometimes with an influence on further processing operations.

Texture

This wood has a somewhat fine texture.

Luster

This wood is commonly of moderate luster.

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 residual stresses are reported in this species.

Resistance To Impregnation

Easy to treat with a full penetration of the preservative products using vacuum-pressure method.

Wood Physical Properties

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

0.60

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

0.67

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

9.2

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

4.4

Drying Defects

Ease of Drying: Drying is moderately difficult to difficult; special care is systematically needed. 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-8

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

2.1

Wood Chemical Properties

Wood Mechanical Properties

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

575

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

75

Shear strength radial 12%MC (kgf/cm²)

94

Janka hardness (side) 12%MC (kgf)

551

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

651

Workability

Sawing

It is easy to saw.

Rotary Veneer Cutting

Suitable for slicing, also suitable for peeling if treated.

Sliced Veneer

Suitable for slicing, also suitable for peeling if treated.

Blunting Effect

Slight blunting effect; ordinary tools can be used for sawing and machining.

Machining

Machining of this species is reportedly easy.

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

No particular problem.

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.

Steam Bending

Steam bending is difficult.

Response To Hand Tools

No particular problems.

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, faces, Decorative veneer, TURNING, ornaments, turned furniture, cutlery, lasts, OTHER AND MUSICAL INSTRUMENTS, handicrafts, moldings

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
Faces
  • 26 - Annual Review and Assessment of the World Timber Situation 1998-ITTO
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
Handcraft
  • 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
Molding
  • 79 - Padronização da Nomenclatura Comercial Brasileira das Madeiras Tropicais Amazônicas, Sugestão

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