Perupok (Lophopetalum javanicum)
Family: Celastraceae
Common names: Adau, Balpale, Banate, Dual, Mata ulat, Perupok, Sang trang, Seng sa, Song sa, Taung-yemare
Distributed in: India, Indonesia, Malaysia, Myanmar, Thailand, Vietnam (Oceania and S.E. Asia)
Distribution overview: Species in the Lophopetalum genus are found in the Indo-Malayan region, North Borneo, and Indonesia.
Common uses: Balusters, Bent Parts, Blockboard, Boat building, Boxes and crates, Building construction, Building materials, Cabinetmaking, Canoes, Casks, Chairs, Chests, Construction, Cutting surfaces, Decorative plywood, Desks, Dining-room furniture, Domestic flooring, Drawer sides, Excelsior, Fine furniture, Flooring, Furniture , Furniture components, Furniture squares or stock, Hardboards, Hatracks, Interior construction, Interior trim, Joinery, Kitchen cabinets, Lifeboats, Light construction, Living-room suites, Millwork, Moldings, Office furniture, Packing cases, Parquet flooring, Particleboard, Pulpwood, Turnery
Environment profile: Generally secure within its natural habitat
Tree size: Trunk diameter is 100-150 cm
Colors: the heart isPink, Redand the sapwoodBrown, Red.The grain isStraight to shallowly interlocked, the textureMediumand the lusterMedium
Natural durability: Non-durable, Perishable
Odor: No distinct taste
Freshly-Cut wood temporarily smells like carnations
Kiln Drying Rate: Naturally dries slowly
Drying Defects: The wood may check and warp slightly during drying. The sapwood may also stain
Ease of Drying: Slowly
Blunting Effect: Blunting effect on machining is slight
Boring:
End-Grain material may crumble in boring, but the timber is generally easy to work
Carving: Good results
Cutting Resistance: Easy to saw
The wood has very little cutting resistance
Mortising: good
Moulding: Good moulding properties
Movement in Service: Good moulding properties
Planing: Lophopetalum timbers are generally easy to work, and plane to yield moderately lustrous surface
Resistance to Impregnation: Sapwood is permeable
Response to hand tools: Respond well to ordinary tools in carving, with moderate blunting effect on cutting edges
Routing recessing:
The timber responds generally well to routing operations, except end-grain material
Turning:
The timbers work rather easily in most operations, but there may be some crumbling when working end-grain material
Painting: Fair to Good; Polishing: Excellent; Staining: Fair to Good; Varnishing: Fairly Easy to Very Easy;
- Numerical data Metric
- Numerical data English
- Strength properties
- References
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 |
 |
 |
Item |
Green |
Dry |
Metric |
Specific Gravity |
0,42 |
|
|
Density |
|
544 |
kg/m3 |
Bending Strength |
394 |
609 |
kg/cm2 |
Crushing Strength |
199 |
372 |
kg/cm2 |
Hardness |
|
|
kg |
Impact Strength |
|
|
cm |
Shearing Strength |
|
96 |
kg/cm2 |
Stiffness |
73 |
80 |
1000 kg/cm2 |
Tangential Shrinkage |
6 |
|
% |
Radial Shrinkage |
3 |
|
% |
Weight |
528 |
432 |
kg/m3 |
Maximum Load |
|
|
cm-kg/cm3 |
Toughness |
|
195 |
cm-kg |
Static Bending |
|
|
kg/cm2 |
|
 |  |  |  | Item | Green | Dry | English | Bending Strength | 5615 | 8673 | psi | Density | | 34 | lbs/ft3 | Maximum Crushing Strength | 2842 | 5292 | psi | Shearing Strength | | 1378 | psi | Stiffness | 1049 | 1142 | 1000 psi | Toughness | | 170 | inch-lbs | Specific Gravity | 0.42 | | | Weight | 33 | 27. | lbs/ft3 | Radial Shrinkage | 3 | | % | Tangential Shrinkage | 6 | | % | Volumetric Shrinkage | 9 | | % | |
The species has medium bending strength in the air-dry condition (about 12 percent moisture content). It is closer in strength to Mahogany than either Teak or White oak, which have higher bending strength. It is weak in compression parallel to grain (maximum crushing strength), and is inferior to Mahogany. The weight is medium. The wood is high in density
Chudnoff, M.,1984,Tropical Timbers of the World,U.S.A. Department of Agriculture, Forest Service, Forest Products,Laboratory, Madison.Keating, W.G., Bolza, E.,1982,Characteristics properties and uses of timbers. South East Asia, Northern,Australia and the Pacific,C.S.I.R.O. Div. Chemical Technology,Inkata Press,1WCMC. 1992. Conservation Status Listing - Trees and Timbers of the World. World Conservation Monitoring Center-Plants Programme, Cambridge, CB3 ODL, United Kingdom.
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