Kosipo

Kosipo

Kosipo

TRADE NAME : Tali

SCIENTIFIC NAME : Entandrophragma candollei Harms
  • BOTANICAL DESCRIPTION : It is a large tree, sometimes of more than 50 m tall. The bole is cylindrical, straight and clear to 32 m in length. The trunk diameter is up to 230 cm, buttressed to a height of about 3 m. It is known or inferred that the harvesting of specimens from th
  • NATURAL HABITAT : Entandrophragma candollei is found in evergreen, moist and transitional forests.
  • NATURAL DISTRIBUTION : In West Africa, from Angola to the Democratic Republic of the Congo.

WOOD DESCRIPTION

COLOR : The sapwood is whitish to pale brown, it has a thickness of 5 to 7.5 cm. The heartwood is brown to dark purple brown, it is clearly demarcated. The silver figure is fine.

COLOR INDEX (1=BLACK,7=LIGHT YELLOW,WHITE) 2
  • GRAIN : Straight or slightly interlocked, sometimes with an influence on further processing operations.
  • TEXTURE : Texture is usually fine to medium.

  • LUSTER: The wood surface is described as low in luster.

  • NATURAL DURABILITY : Because of its variable resistance it is considered as moderately durable to decay. Without treatment, it can be used when risks of occasional re-humidification; it is not suited for uses with risks of permanent or long-lasting humidification. 

  • NATURAL DURABILITY INDEX (1= VERY HIGH DURABILITY,7=VEY LOW DURABILITY)4

  • INTERNAL GROWTH STRESSES : No growth stresses are reported in this species.
  • SILICA CONTENT : Silica Content: Presence of silica is reported in timber of this species. Amounts over 0.050/ may affect the wood processing. Silica Value: 0.21
  • 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/CM°) 0.62 AIR-DRY DENSITY (WEIGHT AND VOLUME AT 120/oM ) (G/CM°)0.69 TOTAL SHRINKAGE TANGENTIAL (SATURATED TO 00/oM ) (0/o)6.7 TOTAL SHRINKAGE RADIAL (SATURATED TO o/oM ) (0/o)4.8 RECOMMENDED DRY KILN SCHEDULE FR-10

WOOD MECHANICAL PROPERTIES

BENDING STRENGTH (MOR),12 0/oM (KGF/CM2 ) 890 STIFFNESS (MOE) 12 o/oM (KGF/CM2 ) 114077 COMPRESSION PARALLEL TO FIBER 120/oM (KGF/CM2 ) 542
COMPRESSION PERPENDICULAR TO FIBER 120/oM (KGF/CM 2 ) 69 SHEAR STRENGTH RADIAL 120/oM (KGF/CM 2 )70  JANKAHARDNESS (SIDE) 120/oM (KGF) 591
JANKAHARDNESS (END GRAIN) 120/oM (KGF) 688

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 : Severe blunting effect; stellited blades for sawing and carbide tools for machining are recommended.
  • MACHINING: Possible difficulties caused by interlocked grain are reported.
  • PLANING: Moderately easy; tools must be cautiously sharpened.
  • MOULDING: Easy; no particular problems.
     BORING: Easy; no particular problems.
  • MORTISING: Easy; no particular problems.
     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:No particular problems.

END USES:

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, OTHER AND MUSICAL INSTRUMENTS, shingle