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Blunting Effect Boring Certified Source Comments Common Names Common Uses Countries of Distribution Cutting Resistance Distribution Overview Drying Defects Ease of Drying Environmental Profile Family Name Gluing Grain Heartwood Color Kiln Drying Rate Kiln Schedules Luster Mortising Moulding Movement in Service Nailing Natural Durability Numerical Data Odor Painting Planing Polishing Product Sources References Regions of Distribution Resistance to Impregnation Response to Hand Tools Routing & Recessing Sapwood Color Scientific Name Screwing Steam Bending Strength Properties Texture Toxicity Trade Name Tree Size Turning Veneering Qualities		Scientific Name Schinopsis spp. Trade Name Quebracho Family Name Anacardiaceae Common Names Barauna, Brauna, Quebracho, Quebracho chaqueno, Quebracho colorado, Quebracho hembra, Quebracho macho, Quebracho moro, Quebracho santiagueno Regions of Distribution Latin America Countries of Distribution  [VIEW MAP] Argentina, Bolivia, Brazil, Paraguay Common Uses Bridge construction, Construction, Crossties, Fuelwood, Posts, Tannin, Utility poles Environmental Profile Rare Extinct Endangered Status has not been officially assessed Distribution Overview reported to grow in Northern Argentina, western Paraguay and a small region of Bolivia. It is also reported to occur in the of Bahia in Brazil. Heartwood Color Red Brown Purple Pink Black Light red, deepening to brick uniform red, sometimes with black streaks High in tannin content Sapwood Color White Yellow Green/Grey Yellowish The border between sapwood and heartwood is not very obvious Grain Figure Irregular, usually roey Texture Medium Fine Coarse Even or uniform Uniform Uniform Fine Luster Low to medium Natural Durability Durable Very durable Susceptible to insect attack Resistant to termites Resistant to powder post beetles Non-resistant to termites Moderately durable Highly vulnerable to attack by beetles High natural resistance to decay and attack by wood destroying insects Odor Has an odor Indistinct odor Astringent taste Toxicity Some toxic effects Sawdust can cause skin irritation in some individuals Kiln Schedules T1-B1(4/4)Us Drying Defects Collapse Internal Honeycombing Possible Checking Uneven Moisture Content Discoloration Checking and warping are severe during drying, especially thinner boards Ease of Drying Fairly Easy Rapidly Reconditioning Treatement Moderately Difficult to Difficult Thinner stock is highly prone to degrade Difficult Kiln Drying Rate Naturally dries quickly Tree Size Tree height is greater than 70 m Tree height is 60-70 m Trunk diameter is 300-350 cm Trunk diameter is 200-250 cm Trunk diameter is 150-200 cm Bole length is 20-30 m Bole length is 30-40 m Tree height is 50-60 m Tree height is 40-50 m Sapwood width is 5-10 cm Boles often have swollen basal areas, and are usually of poor form. Harvesting is typically accomplished with heavy axes, and the sapwood is usually removed to reduce weight and prevent beetle attack Product Sources Supplies are very limited and Quebracho is generally difficult to obtain, since only small quantities are exported. Refer to the Resources of the database for the names and contact information of several suppliers and importers of timber and other wood products in the U.S. and abroad. Certified Source Certified Source Comments Contains 20-30% tannin and the tree was primarily used as a source for tannin Quebracho logs were exported to the U.S. and Europe where the tannin was extracted Blunting Effect Little High to severe Boring Fairly easy to very easy Fair to good results Cutting Resistance Easy to saw Gluing Fairly Easy to Very Easy Very Good to Excellent Results Fairly Difficult to Very Difficult Fair to Good Results Mortising Fairly Easy to Very Easy Fair to Good Results Very Good to Excellent Results Fairly Difficult to Very Difficult Moulding Fairly Easy to Very Easy Fair to Good Results Very Good to Excellent Results Fairly Difficult to Very Difficult Movement in Service Excellent Stability - Small Movement Nailing Fair to Good Results Pre-Boring Recommended Fairly Easy to Very Easy Poor to Very Poor Results Very Good to Excellent Results Planing Fairly Easy to Very Easy Fair to Good Results Very Good to Excellent Results Fairly Difficult to Very Difficult Very difficult to work with ordinary tool in most machining operations Resistance to Impregnation Resistant heartwood Resistant sapwood Permeable sapwood Response to Hand Tools Easy to Work Fairly Difficult to Difficult to Work Routing & Recessing Fairly Easy to Very Easy Very Good to Excellent Results Fairly Difficult to Very Difficult Fair to Good Results Screwing Pre-boring recommended Fairly Easy to Very Easy Poor to Very Poor Results Very Good to Excellent Results Turning Fairly Easy to Very Easy Fair to Good Results Very Good to Excellent Results Veneering Qualities Difficult to veneer Suitable for peeling Steam Bending Fair to Good Results Painting Fair to Good Results Fairly Easy to Very Easy Very Good to Excellent Results Polishing Takes a high natural polish Strength Properties Exceptionally heavy Weighing much more than White oak or Teak. The wood is a sinker Numerical Data Item Green Dry English Density 74 lbs/ft3 Specific Gravity 0.98 1.21 Weight 73 60. lbs/ft3 Item Green Dry Metric Density 1185 kg/m3 Specific Gravity 0.98 1.21 References Boone, R.S., C.J. Kozlik, P.J. Bois and E.M. Wengert. 1988. Dry Kiln Schedules for Commercial Woods: Temperate and Tropical. United States Department of Agriculture, Forest Service, Forest Products Laboratory, General Technical Report FPL-GTR-57, Madison, Wisconsin. Chichignoud, M., G. Deon, P. Detienne, B. Parant, and P. Vantomme. 1990. Tropical Timber Atlas of Latin America. Prepared for International Tropical Timber Organization (ITTO) by Centre Technique Forestier Tropical (CTFT, Division of CIRAD, 45bis, Avenue de la Belle Gabrielle, Nogent-sur-Marne Cedex, France. Chudnoff, M.,1984,Tropical Timbers of the World,U.S.A. Department of Agriculture, Forest Service, Forest Products,Laboratory, Madison. Kline, M. 1981. Schinopsis lorentzii - Quebracho. In A Guide to Useful Woods of the World. Flynn Jr., J.H., Editor. King Philip Publishing Co., Portland, Maine. 1994. Page 325-326. Kribbs, D.A. 1959. Commercial Foreign Woods on the American Market. Buckhout Lab., Dept. of Botany, The Pennsylvania State University, University Park, Pennsylvania. Patterson, D. 1988. Commercial Timbers of the World. Fifth Edition. Gower Technical Press, Aldershot, UK. ix + 339 pp. Titmuss, F.H. 1965. Commercial Timbers of the World. Third Edition (Enlarged of A Concise Encyclopedia of World Timbers). The Technical Press Ltd., London.