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Blunting Effect
Boring
Carving
Comments
Common Names
Common Uses
Cutting Resistance
Drying Defects
Ease of Drying
Environmental Profile
Family Name
Grain
Heartwood Color
Kiln Schedules
Luster
Mortising
Moulding
Nailing
Natural Durability
Numerical Data
Planing
Polishing
References
Regions of Distribution
Response to Hand Tools
Routing & Recessing
Sapwood Color
Scientific Name
Screwing
Staining
Strength Properties
Synonyms
Texture
Trade Name
Tree Identification
Tree Size
Turning
| Scientific
Name Diospyros marmorata Trade Name Andaman ebony Family Name Ebenaceae |
|
Synonyms
Diospyros oocarpa
Common Names
Andaman ebony, Andaman marblewood, Kala takri, Pecha-da, Teakah, Thitkya, Zebrawood
Regions of Distribution
Oceania and S.E. Asia
Common Uses
Brush backs & handles, Cabinetmaking, Carvings, Moldings, Musical instruments: piano, Musical instruments: strings, Paneling, Turnery, Veneer: decorative, Walking sticks
Environmental Profile
| Vulnerable | ||||||||||||
| Endangered |
Heartwood Color
| Brown | ||||||||||||
| Purple | ||||||||||||
| Green/grey | ||||||||||||
| Red | ||||||||||||
| Greenish to greyish | ||||||||||||
| Brown | ||||||||||||
| White to cream |
Sapwood Color
| Brown | ||||||||||||
| Well defined | ||||||||||||
| Paler than heartwood |
Grain
| Figure | ||||||||||||
| Stripe (figure) | ||||||||||||
| Even | ||||||||||||
| Closed | ||||||||||||
| Variable (figure) | ||||||||||||
| Distinct (figure) | ||||||||||||
| Wavy | ||||||||||||
| Other (figure) | ||||||||||||
| Straight |
| Striped figure | ||||||||||||
| Irregular color | ||||||||||||
| Wavy | ||||||||||||
| Straight | ||||||||||||
| Other figure | ||||||||||||
| Distinct figure |
Texture
| Medium | ||||||||||||
| Fine | ||||||||||||
| Fine |
Luster
| Medium | ||||||||||||
| Slightly lustrous | ||||||||||||
| Dull |
Natural Durability
| Perishable | ||||||||||||
| Susceptible to insect attack | ||||||||||||
| Non-durable | ||||||||||||
| Non-resistant to powder post beetles | ||||||||||||
| Non-resistant to termites | ||||||||||||
| Moderately durable | ||||||||||||
| Very durable | ||||||||||||
| Moderately resistant to termite (Isoptera) attack | ||||||||||||
| Moderately durable | ||||||||||||
| Durable |
Kiln Schedules
| UK=C US=T3C2/T3C1 Fr=3 |
Drying Defects
| Distortion | ||||||||||||
| Checking | ||||||||||||
| Moderate surface checking | ||||||||||||
| Moderate twist/warp | ||||||||||||
| Moderate end spitting |
Ease of Drying
| Medium to High Shrinkage | ||||||||||||
| Moderately Difficult to Difficult | ||||||||||||
| Fairly Easy | ||||||||||||
| Difficult |
Tree Identification
| Bole/stem form is straight | ||||||||||||
| Bole/stem form is cylindrical |
Tree Size
| Bole length is 0-10 m |
Comments
General finishing qualities are rated as good
Blunting Effect
| Moderate | ||||||||||||
| Blunting effect on machining is severe |
Boring
| Fair to good results | ||||||||||||
| Fairly easy to very easy |
Carving
| Fair to Good Results | ||||||||||||
| Fairly Easy to Very Easy |
Cutting Resistance
| Easy to saw | ||||||||||||
| Cutting Resistance with green wood is difficult |
Mortising
| Fair to Good Results | ||||||||||||
| Fairly Easy to Very Easy |
Moulding
| Fair to Good Results | ||||||||||||
| Fairly Easy to Very Easy |
Nailing
| Fair to Good Results | ||||||||||||
| Fairly Easy to Very Easy | ||||||||||||
| Possible if prebored |
Planing
| Fair to Good Results | ||||||||||||
| Fairly Easy to Very Easy | ||||||||||||
| Difficult to plane | ||||||||||||
| Planes well, to a good finish |
Response to Hand Tools
| Easy to Work | ||||||||||||
| Difficult to machine |
Routing & Recessing
| Fair to Good Results | ||||||||||||
| Fairly Easy to Very Easy |
Screwing
| Fair to Good Results | ||||||||||||
| Fairly Easy to Very Easy |
Turning
| Fair to Good Results | ||||||||||||
| Fairly Easy to Very Easy | ||||||||||||
| Good results | ||||||||||||
| Easy to turn |
Polishing
| Good results |
Staining
| Fair to Good Results | ||||||||||||
| Fairly Easy to Very Easy |
Strength Properties
| Density (dry weight) = 61-67 lbs/cu. ft | ||||||||||||
| Density (dry weight) = 53-60 lbs/cu. ft | ||||||||||||
| Shearing strength (parallel to grain) = medium | ||||||||||||
| Modulus of Elasticity (stiffness) = medium | ||||||||||||
| Max. crushing strength = high | ||||||||||||
| Density (dry weight) = >75 lbs/cu. ft | ||||||||||||
| Density (dry weight) = 67-75 lbs/cu.ft | ||||||||||||
| Bending strength (MOR) = low |
Numerical Data
| Item | Green | Dry | English |
| Bending Strength | 6111 | 9589 | psi |
| Density | 59 | lbs/ft3 | |
| Maximum Crushing Strength | 6899 | 9945 | psi |
| Shearing Strength | 2205 | psi | |
| Stiffness | 1665 | 1923 | 1000 psi |
| Weight | 58 | 50 | lbs/ft3 |
| Item | Green | Dry | Metric |
| Bending Strength | 429 | 674 | kg/cm2 |
| Density | 945 | kg/m3 | |
| Maximum Crushing Strength | 485 | 699 | kg/cm2 |
| Shearing Strength | 155 | kg/cm2 | |
| Stiffness | 117 | 135 | 1000 kg/cm2 |
References
Farmer, R.H.,1972,Handbook of Hardwoods,HMSO
Forests Products Research Laboratory, U.K.,1956,A Handbook of Hardwoods,Forest Products Research Laboratory, Princes Risborough, Department of,Science and Industrial Research, Building Research Establishment
Gamble, J.S.,1902,A Manual of Indian Timbers,Sampson Low, Marston & Co. London
Patterson, D.,1988,Commercial Timbers of the World, 5th Edition,Gower Technical Press
Pearson, R.S., Brown, H.P.,1932,Commercial Timbers of India,Govt. Printer Calcutta,2 vols
Rendle, B.J.,1969,World Timbers (3 Vols.,Ernest Benn Ltd. London