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BOSSé FONCé (Guarea thompsonii)
Nombre comercial
Bossé foncé
Nombre científico (con autor)
Guarea thompsonii Sprague et Hutch.
Familia
MELIACEAE
Nombres Comunes
Obobo Nekwi (Nigeria); Mutigbanaye (Côte d`Ivoire); Diambi (Germany); Ugbokpo; Tshidiamakeka; Teninini; Sweet cedar; Sidu; Scented mahogany; Ofe; Oboborukin; Obobo-nekwi; Obabonekwi; Nuguata; Nigerian pearwood; Nigerian cedar; Mutigbanaga; Mietandabo; Koguibe; Kaffi; Hapopeya; Dikunze; Diambi; Close grained mahogany; Cedron; Cedar mahogany; Busi; Bo-in-dah; Avellano; Akpaku; Black guarea (United Kingdom); Edoucie (Cameroon); Obobo (Nigeria); Kwabohoro (Ghana); Bosse (Côte d`Ivoire); Diampi (Germany); Diampi (Zaire); Bolon (Kenya); Obo nekwi (Nigeria); Bossé foncé
DESCRIPCIÓN DEL ÁRBOL
Descripción botánica
The tree reaches a height of 35 to 40 m. The bole is generally unbuttressed, with occasional fluting, up to 20 m in length. The trunk diameter attains 130 up to 150 cm. Log is banned for international trading.(Cameroon)
Hábitat natural
Guarea thompsonii occurs commonly in hilly moist evergreen dense forests, often as a dominant tree. National conservation status in Cote d`Ivoire V, Liberia E.
Distribución natural
West Africa
IDENTIFICACIÓN DE LA MADERA
Descripción anatómica de la madera
Wood diffuse porous. Occasionally vessels exclusively solitary (over 90%). Tangential diameter of vessel lumina 100 to 150 micras (small). Non-vestured pits. Vessels per mm2 10 to 20 (abundant). Simple perforation plates. Vessel-ray pits similar to intervessel Axial parenchyma oblique and/or sinuous. Prismatic crystals in chambered axial parenchyma cells and/or in fibers. 5 to 8 cells per parenchyma strand. Axial parenchyma bands over 4 per mm. Rays non-storied. Rays commonly 2 seriate. Occasionally silica bodies in the ray cells. Homogeneous rays and/or sub-homogeneous rays (all ray cells procumbent). Body ray cells procumbent with one row of upright and/or square marginal cells (Kribs-III). Occasionally septate fibers present. Fibers with simple to minutely bordered pits.
Disponibilidad
Status de protección por CITES
Unrestricted
DESCRIPCIÓN GENERAL DE LA MADERA
Color
The sapwood is pale color, it has a thickness of 5 to 10 cm. The heartwood is pinkish brown to orange brown, it is clearly demarcated. The silver figure is fine (barely visible).
Grano
The grain is slightly but systematically interlocked.
Veta
This species is reported to have a fine to medium texture.
Durabilidad Natural
Durable to decay; this species can be utilized without preservative treatment for exterior joinery or similar uses. Moderately resistant to termites attack. Heartwood is resistant to Lyctus attacks.
Indice de Durabilidad Natural (1=Muy alta, 7=Muy baja)
1
Internal growth stresses
Residual stresses are reported to be absent.
Dificultad para impregnar
Nearly impossible to treat with a too much low penetration of the preservative substances.
PROPIEDADES FÍSICAS DE LA MADERA
Densidad Básica (Peso anhidro/Vol. saturado) (g/cm³)
0.61
Densidad seca al aire (Peso y volúmen CH12%) (g/cm³)
0.68
Defectos por secado
Ease of Drying: Drying is moderately easy; some particular care is needed. Drying Defects: No particular risks of drying defects, subject to normal drying conditions. Kiln Schedules: Schedule proposed as a reference by comparison with well known species taking into account to the general technological behavior of this species.
Calendario de Secado
FR-6
PROPIEDADES QUÍMICAS DE LA MADERA
PROPIEDADES MECÁNICAS DE LA MADERA
Resistencia a flexión (Módulo de ruptura) CH12% (kgf/cm²)
1184
Rigidez (Módulo de elasticidad) CH12% (kgf/cm²)
159961
Resistencia a la compresión paralela a la fibra CH12% (kgf/cm²)
673
Resistencia a la compresión perpendicular a la fibra CH12% (kgf/cm²)
92
Cizallamiento radial CH12% (kgf/cm²)
72
Dureza Janka (lados) CH12% (kgf)
565
Dureza Janka (extremos) CH12% (kgf)
664
TRABAJABILIDAD
Aserrado
It is easy to saw.
Corte de chapa rotativa
Suitable for slicing, also suitable for peeling if treated.
Chapa tranchada
Suitable for slicing, also suitable for peeling if treated.
Pérdida de filo_romado
Moderate blunting effect; stellited blades for sawing and carbide tools for machining are advised.
Maquinado general
Possible difficulties caused by interlocked grain are reported.
Cepillado
Moderately easy; tools must be cautiously sharpened.
Moldurado
Moderately easy; tools must be cautiously sharpened.
Torneado
30
Taladrado
Moderately easy; tools must be cautiously sharpened.
Escopleado, caja y espiga
Moderately easy; tools must be cautiously sharpened.
Clavado
Pre-boring is necessary.
Encolado
Difficult to glue because of the extracts content.
Lijado
Easy to perform; it gives good results.
Sacar lustre
Can be polished without surface preparation.
Doblar al vapor
This species can be used for steam bending.
Facilidad para herramientas manuales
No particular problems.
Usos Reportados
USOS FINALES (RESUMEN)
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, NAVAL CONSTRUCTION, boat deck, port storage, OTHER AND MUSICAL INSTRUMENTS, handicrafts, cigar boxes
VIVIENDA GENERAL
- 10 - Silica in Timbers
vigas
- 11 - Prospect: The wood database
Viguetas
- 12 - Tropical timbers of the world. Part I-Tropical American Species
Tablas
- 13 - Dry kiln schedules for commercial woods. Temperate and tropical. Section III. Latin American (Mexico, Central, and South America) Woods–Conventional Temperatures
Pisos
- 14 - Handbook of Hardwoods
Parquet
- 15 - Empire Timbers
Marcos
- 16 - Woods of the World
Peldaños
- 17 - Tree Conservation Database
Paneles
- 18 - W3TROPICOS Missouri Botanical Garden
Accesorios de madera
- 19 - Silica in Timbers
MUEBLES Y GABINETES
- 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
Muebles finos
- 22 - Dry kiln schedules for commercial woods. Temperate and tropical. Section IV-Asian and Oceanian Woods
Gabinetes
- 24 - Empire Timbers
TABLEROS Y CHAPAS
- 25 - Directory of Timber Trade Malaysia
Caras
- 26 - Annual Review and Assessment of the World Timber Situation 1998-ITTO
chapa decorativa
- 28 - Ministry of Agriculture, Fisheries & Forest of Fiji
Torneado
- 30 - Embassy of Honduras in Japan
artículos torneados
- 31 - Embassy of Colombia in Japan
Artículos torneados
- 32 - Embassy of Cote d`Ivoire in Japan
CONSTRUCCIÓN NAVAL
- 55 - Tropical Timber Atlas of Latin America
Botes_cubierta
- 59 - Programa Nacional de uso Sostenible de los Bosques e Incremento a las Exportaciones.
Puertos_estantería
- 62 - Estudio Tecnológico de Maderas del Perú (Zona Pucallpa) Vol I
artesanía
- 66 - Maderas latinoamericanas. VII. Caracteristicas anatomicas. propiedades fisicomecanicas, de secado, y tratabilidad de la madera juvenil de Cordia alliodora (Ruiz & Pav. Oken.)
Caja para puros
- 68 - Contribucion al conocimiento de la resistencia mecanica de la madera de peumo
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