Search for

content="text/html; charset=ISO-8859-1" http-equiv="content-type"> Clicking any heading in the main data area (at right) will scroll the page back to this top position. Use the following links to jump to the associated section in the main data. 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