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JACK, (Artocarpus heterophyllus)

Trade Name

Jack,

Scientific Name

Artocarpus heterophyllus Lamk

Family

Moraceae

Common Names

pilavu (India); kathal (India)

Scientific Name Synonyms

A.integnfilia Linn

Description Of The Tree

Botanical Description

Medium to large, 18-25 m in height, and up to 120 cm in diameter. Bark blackish, mottled with black and green, rough with warty excerescences.

Natural Distribution

West coast tropical evergreen and Southern hill-top tropical evergreen forests; widely cultivated

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Wood Identification

Anatomic Description Of Wood

Wood diffuse porous. Tangential diameter of vessel lumina 200 micras or more (large). Vessels per mm2 less than 6 (rare). Vessels in radial multiples of 2 to 4. Tyloses common. White deposits in heartwood vessels. Paratracheal axial parenchyma scanty and/or vasicentric. Axial parenchyma aliform. Rays 1 to 4 seriate.

Availability

Cites Status

Unrestricted

General Wood Description

Color

Sapwood greyish or pale yellow, heart wood yellow to yellowish-brown or pinkish- brown, lustrous when first exposed

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

6

Grain

Straight to interlocked

Texture

texture medium

Natural Durability

Very durable

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

1

Wood Physical Properties

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

0.60

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

8.4

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

43.0

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

0.2

Wood Chemical Properties

Wood Mechanical Properties

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

806

Stiffness (MOE) 12%MC (kgf/cm²)

100700

Workability

Sawing

Easy to saw and work

Turning

30

Finishing

can be brought to a smooth finish and takes good polish

REFERENCED USES

End Uses Summary

HOUSING GENERAL, beams, boards, FURNITURE AND CABINETS, cabinets, PLYWOOD AND VENEER, faces, cores, TURNING, TOOLS, CONTAINERS, truck bodies, NAVAL CONSTRUCTION, boats, OTHER AND MUSICAL INSTRUMENTS, handicrafts

General Housing
  • 10 - Silica in Timbers
Beams
  • 11 - Prospect: The wood database
Boards
  • 13 - Dry kiln schedules for commercial woods. Temperate and tropical. Section III. Latin American (Mexico, Central, and South America) Woods–Conventional Temperatures
Furniture Cabinets
  • 21 - Tropical timbers of the world. Part III-Southeast Asian and Oceanian Species.
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
Cores
  • 27 - Embassy of Brazil in Japan
Turning
  • 30 - Embassy of Honduras in Japan
Tools
  • 42 - Utilización Industrial de Nuevas Especies Forestales en el Perú.
Containers
  • 50 - Properties of imported tropical woods
Truck Body
  • 53 - Timbers of the New World
Shipbuilding
  • 55 - Tropical Timber Atlas of Latin America
Boats
  • 56 - Manual de Identificación de Especies Forestales de la Subregión Andina.
Other & Musical Instruments
  • 63 - Madeiras do Brazil II
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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