A S P E N   ( P O P U L U S   T R E M U L A )

Common Names
European aspen, Finnish aspen, Swedish aspen, French aspen.

Common Uses
Boxes and crates, Decorative veneer, Drawer sides, Flooring, Furniture, Furniture components, Interior construction, Joinery, Matches, Plywood, Toys, Truck bodies, Veneer.

Category Green Dry Unit
Specific Gravity   0.45  
Weight   28 lbs/cu.ft.

Species Distribution
REGIONS: Eastern Europe, Mediterranean Sea Region, Asia, Western Europe.

COUNTRIES: CIS, Finland, France, Germany, Netherlands, Norway, Poland, Sweden, United Kingdom.

Physical and Environmental Profile
Environmental Profile
The environmental status of this species within its natural growth range has not been officially assessed.

Distribution
Native to Scotland, Ireland, England, and Wales, the species is reported to occur in Europe, northern Africa, and Asia. Its natural range is reported to include the entire British Isles, and is also found in the Scandinavian countries, Poland, and Russia. The tree is reported to tolerate poor soils very well. It occurs in the mountains in the southern region of its growth range.

Product Sources
It is currently unknown whether lumber and other timber products produced from this species are available from environmentally responsible sources.

Several species of Poplar and European aspen are reported to be routinely marketed together, although timber quality within each species can vary significantly depending upon growth conditions.

Tree Data
Aspen trees are reported to rarely be tall trees. They reach about 60 to 80 feet (18 to 24 m) in height, with a trunk diameter usually 3 to 4 feet (90 to 120 cm), though they can be larger. Aspen from Britain is reported to seldom attain timber sizes, and are usually cultivated for other purposes than the production of timber.

Heartwood Color
The wood is usually creamy-white to gray in color, but may be light brown or pinkish-brown, with the heartwood and sapwood seldom differentiable. European aspen is reported to be whiter in color, and is generally of better quality than Poplars.

Grain
The grain is reported to be typically straight.

Texture
Uniformity in structure and little contrast between earlywood and latewood gives Aspen a fine and even texture. It tends to be wooly, but Aspen is generally considered to have a finer texture than the Poplars.

Odor
There is no distinct odor or taste.

Ease of Drying
The timber is reported to dry fairly rapidly and well.

Drying Defects
Wet pockets are reported to be rather common, and knots tend to split during drying.

Kiln Schedules
Schedule E (4/4) United Kingdom

Movement in Service
Dimensional stability is reported to be fair, and the wood shows medium movement in use.

Natural Durability
The heartwood is reported to have very little natural resistance to decay in contact with the ground. Standing trees and logs are vulnerable to attack by forest longhorn beetles, and trees may be attacked by wood-boring caterpillars. The sapwood is reported to be seldom attacked by powder-post beetles.

Blunting Effect
The wood is reported to dull cutting edges slightly.

Cutting Resistance
Saws tend to bind occasionally during conversion, but cross-cutting and narrow bandsawing operations are reported to be satisfactory.

Planing
Aspen tends to be woolly and requires very sharp and thin cutting angles for best results in planing and other machining operations. Cutters with reduced sharpness angle have also been recommended.

Gluing
Gluing qualities are reported to be very good.

Nailing
The timber is reported to accept nails satisfactorily.

Polishing
Polishing properties are reported to be satisfactory.

Staining
Staining qualities are rated as fair, although surfaces sometimes tend to stain unevenly.

Varnishing
Varnishing characteristics are rated as satisfactory.

Painting
The timber is reported to take paints fairly well.

Steam Bending
Aspen is reported to be unsuitable for solid bending since it tends to buckle severely on the concave face. Strapping and end-pressure devices are reported to do very little to improve bending properties.

Strength Properties
European aspen is reported to have rather low strength properties in bending, stiffness, and resistance to shock. Its crushing strength is rated as medium, and weight is about average.

References
Numeric Data Source
Lavers, G.M. 1967. The Strength Properties of Timbers. Forest Products Research Bulletin, No. 50 (Spersedes Bulletin No. 45). Ministry of Technology, Her Majesty's Stationery Office, London.

Descriptive Data Source
HMSO. 1985. Broadleaves. Forestry Commission Booklet No. 20. Text by H.E. Edlin. Revised by A.F. Mitchell. Forestry Commission, Her Majesty's Stationery Office, London.

HMSO. 1981. Handbook of Hardwoods, 2nd Edition. Revised by R.H. Farmer. Department of the Environment, Building Research Establishment, Princes Risborough Laboratory, Princes Risborough, Aylesbury, Buckinghamshire.

Lincoln, W.A. 1986. World Woods in Color. Linden Publishing Co. Inc. Fresno, California.

Nairn, P.M., Editor. 1936. Wood Specimens - 100 Reproductions in Color - A Series of Selected Timbers Reproduced in Natural Color with Introduction and Annotations by H.A. Cox. The Nema Press, Proprietors of Wood, London.

British Woodworking Federation. 1995. Which Wood . Published by the British Woodworking Federation, Broadway House, Tothill Street, London.

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