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Perupok
Perupok (Lophopetalum duperreanum)

Family: Celastraceae

Common names: Balpale, Banate, DualAdau, Mata ulat, Perupok, Sang trang, Seng sa, Song sa, Taung-yemare

Distributed in: Brunei, 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: The environmental status of this species within its natural habitat has not been officially assessed

Tree size: Tree height is 30-40 m

Colors: the heart isPurple, Redand the sapwoodWhite, Yellow.The grain isStraight to shallowly interlocked, the textureMediumand the lusterMedium

Natural durability: Resistant to termites, Susceptible to insect attack

Odor: No distinct taste Freshly-Cut wood temporarily smells like carnations

Kiln Drying Rate: Naturally dries slowly

Drying Defects: Distortion, Splitting

Ease of Drying: Variable

Blunting Effect: Blunting effect on machining is slight

Boring: Fairly easy to very easy

Carving: Good results

Cutting Resistance: Easy to saw The wood has very little cutting resistance

Gluing: Fairly Easy to Very Easy

Mortising: good

Moulding: Good moulding properties

Movement in Service: Good moulding properties

Planing: Fairly Easy to Very Easy

Resistance to Impregnation: Sapwood is permeable

Response to hand tools: Responds well

Routing recessing: Fairly Easy to Very Easy

Veneering qualities: Veneers easily, Veneers moderately easy

Turning: Very Good to Excellent Results

Polishing: Very Good to Excellent; Varnishing: Poor to Very Poor;

  • Numerical data Metric
  • Numerical data English
  • Strength properties
  • References
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 194 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 169 inch-lbs
Specific Gravity 0.42
Weight 33 27. lbs/ft3
Radial Shrinkage 3 %
Tangential Shrinkage 6 %
Volumetric Shrinkage 9 %

Max. crushing strength = low
Compression strength (parallel to grain) = low
Bending strength in the air-dried condition (about 12% moisture content) is medium, but lower than Mahogany, and much lower than White oak. It is weaker than Mahogany or Teak. The weight is about average. 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,1
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