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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. Boring Carving Common Names Common Uses Countries of Distribution Cutting Resistance Drying Defects Ease of Drying Family Name Gluing Grain Heartwood Color Light-Induced Color Change Luster Mortising Moulding Nailing Natural Durability Numerical Data Planing Polishing References Regions of Distribution Resistance to Impregnation Response to Hand Tools Routing & Recessing Sapwood Color Scientific Name Screwing Staining Strength Properties Texture Toxicity Trade Name Tree Identification Turning Scientific Name Schinopsis lorentzii Trade Name Paag Family Name Anacardiaceae Common Names Paag, Quebracho, Quebracho colorado, Quebracho cornillo, Real quebracho, Santiagueno, Soto negro Regions of Distribution Latin America Countries of Distribution  [VIEW MAP] Argentina, Bolivia, Brazil, Paraguay Common Uses Axles, Bridge construction, Flooring, Flooring: industrial heavy traffic, Fuelwood, Handles: general, Heavy construction, Joinery, Ladders, Light construction, Marine construction, Mine timbers, Piling, Poles, Posts, Railroad ties, Sporting Goods, Turnery, Vehicle parts Heartwood Color Brown Yellow Pink Red Pale red to pink Reddish brown Brown, red, dark reddish brown with nearly black stripes after prolonged exposure Sapwood Color Brown Yellow White to yellow Well defined Pinkish Grain Figure Interlocked Other (figure) Stripe (figure) Interlocked Other figure Striped figure Texture Medium Fine Luster Lustrous Slightly lustrous Natural Durability Very durable Resistant to attack from marine borers Susceptible to attack from powder post (Lyctid & Bostrychid) beetles Pinworms (ambrosia beetles) may be present in the felled log Light-Induced Color Change Darker Toxicity Dermatitic effects Respiratory effects Drying Defects Splitting Checking Severe twisting/warping Severe surface checking Moderate twist/warp Moderate surface checking Ease of Drying Slowly Thick Stock Requires Care Reconditioning Treatement Tree Identification Bole/stem form is straight Bole/stem form is misshapen Boring Fairly difficult to very difficult Carving Fairly Difficult to Very Difficult Cutting Resistance Easy to saw Cutting Resistance with green wood is difficult Cutting Resistance with dry wood is difficult Gluing Fairly Easy to Very Easy Fair to Good Results Mortising Fairly Difficult to Very Difficult Moulding Fairly Difficult to Very Difficult Poor moulding results Nailing Pre-Boring Recommended Fair to Good Results Fairly Easy to Very Easy Possible if prebored Planing Fairly Difficult to Very Difficult Resistance to Impregnation Resistant sapwood Resistant heartwood Response to Hand Tools Responds Poorly Difficult to machine Routing & Recessing Fairly Difficult to Very Difficult Screwing Possible if prebored Turning Fairly Difficult to Very Difficult Easy to turn Polishing Fair to Good Results Good results Satisfactory results Staining Finish is generally good Strength Properties Density (dry weight) = 67-75 lbs/cu.ft Density (dry weight) = >75 lbs/cu. ft Density (dry weight) = 61-67 lbs/cu. ft Modulus of Elasticity (stiffness) = high Max. crushing strength = high Bending strength (MOR) = high Numerical Data Item Green Dry English Bending Strength 13576 20956 psi Density 57 lbs/ft3 Maximum Crushing Strength 6899 9945 psi Stiffness 2167 2494 1000 psi Weight 57 56 lbs/ft3 Item Green Dry Metric Bending Strength 954 1473 kg/cm2 Density 913 kg/m3 Maximum Crushing Strength 485 699 kg/cm2 Stiffness 152 175 1000 kg/cm2 References Berni, C.A., Bolza, E., Christensen, F.J.,1979,South American Timbers - The Characteristics, Properties and Uses of 190,Species,C.S.I.R.O Div. Building Research Howard, A.L.,1948,A Manual of Timbers of the World.,Macmillan & Co. Ltd. London 3rd ed. Kryn, J.M.,1954,Quebracho, Quebracho Colorado, Quebracho Macho-Schinopsis lorentzii Engl,and Schinopsis balansae Engl,U.S.A. Department of Agriculture, Forest Products Laboratory, Madison,Information Leaflet, Foreign Woods Report No 1969 Patterson, D.,1988,Commercial Timbers of the World, 5th Edition,Gower Technical Press Record, S.J., Hess, R.W.,1943,Timbers of the New World,Yale University Press Record, S.J.,1939,American Woods of the Family Anacardiaceae,Tropical Woods,8(60,pp11-45 Tortorelli, L.,1956,Maderas y Bosques Argentinos,Editorial Acme S.A.C.I. Buenos Aires Woods, R.P.,1949,Timbers of South America,TRADA, Red Booklet Series