Woodland Burl: Used for furniture

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Vavona Burl ” North America “

  • Trade Names: Vavona Burl, Redwood Burl
  • Similar woods: Thuya Burl
  • Range: The coastal region of Northern California and Southern Oregon. Seldom occurs more than 30 miles away from the Pacific or at altitudes over 3,000 feet.
  • Range: The burl is the root of the Mammothtree and is often gigantic in size. The burls have to be dug out which often involves a great deal of work.
  • Uses: High quality architectural woodwork, furniture production possible but only produced in Southern Europe so far.
  • Properties: The Vavona Burl is deep dark red in color and in principle one can differentiate between two types:
  • Seasoning: The wood must be dried extremely slowly to avoid checking in the burl surface. The more carefully the wood is dried the better the result.
  • 1. Lace form: the actually burly wood.
  • Finishing: A polished surface is recommended to highlight the burly texture but a light gloss should be produced at least.
  • 2. Birdseye form: fine, darkly pronounced dots are scattered over the surface similar to the Birdseye Maple. The veneers are relatively fragile.
  • Jointing: Gluing of Vavona, mainly as veneer, can be carried out satisfactorily. Screw joints must be pre-drilled.
  • Machining: Vavona can only be worked with very sharp tools with the greatest of care and due consideration to the burl formation. However, produced surfaces are satisfactory.

White Ash Burl ” Europe “

  • Trade Names: European Ash, White Ash Burl
  • Similar woods: Myrtle Burl
  • Origin: Europe, but generally restricted to Western Europe.
  • Range: The Ash Burl is a trunk burl, i.e. the burl forms in the trunk and not in the root.Generally it is a matter of freestanding or small groups of trees on which a lot more branches have developed.
  • Uses: High quality architectural woodwork as well as high quality produced furniture, widely used in the USA and the Far East.
  • Properties: Completely sound, large dimensioned, full burl logs are very rare. Frequently either small black knots are found in the burl or more of a cluster type.
  • Machining: Ash can be worked easily and well with all tools. Coarse grown logs tend to split at their planed edges. Very smooth surfaces are produced.
  • Seasoning: The drying operation should be carried out at moderate temperatures and not too hurriedly. There is only a slight tendency to warp. Surface checking very seldomly occurs.
  • Finishing: Ash is suitable for all kinds of surface treatments and colored stains are used in particular. Their use presents no problems.
  • Jointing: Glue is taken well by Ash and produces very durable joints. Pre-drilled screw joints hold well.

Olive Ash Burl “Europe”

  • Trade Names: Olive Ash Burl
  • Origin: Europe, but generally restricted to Western Europe.
  • Range: These are Ash Burl trunks with colored heart. Since the colored heart develops irregularly, due to the wild texture of the wood, the veneer pattern frequently has interesting light & dark color
  • Uses: High quality architectural woodwork, used also in Southern Europe for furniture.
  • Machining: Problems can occur in the form of fibre pick-up from the surface due to the burl growth.
  • Seasoning: As is the case with all burls, drying is to be carried out slowly and carefully.
  • Seasoning: When drying too quickly the different directions of shrinkage are so great that the given tension can cause checking, both on the surface and inside the wood, which lead to total degrading.
  • Finishing: Ash is suitable for all kinds of surface treatments. Colored stains are used in particular. Their application presents no difficulties.
  • Jointing: Glue is readily accepted by Ash and produces very durable joints. Pre-drilled screw joints hold well.

Chestnut Burl “Europe, Asia.”

  • Trade Names: Chestnut Burl
  • Range: Occurs very seldom as burl or cluster, but if so mostly in Southern Europe.
  • Range: Occurs very seldom as burl or cluster, but if so mostly in Southern Europe.
  • Uses: Architectural woodwork, not suitable for mass-produced furniture because of the scarcity of this wood.
  • Properties: Very decorative.
  • Machining: The machining of dried lumber presents no special problems. It can be easily planed, molded and turned.
  • Seasoning: The somewhat difficult drying is made even more problematic by the burly texture of the wood. Draft and heat must be avoided by all means.
  • Seasoning: Drying free of checking and tension can only be achieved by taking the greatest care.
  • Finishing: Machining should be carried out at low feed speeds to prevent fibre pick-up in the surface.
  • Jointing: Gluing of Chestnut Burl is possible without difficulty. Screw and nail joints hold firmly. Due to the high tannin content reaction stains can occur when coming into contact with metal.

Elm Burl “Central Europe”

  • Similar woods: Oak Burl
  • Range: Mainly in France & England. Due to the Dutch Elm disease the occurrences are very rare. The majority of the felled burl trees are already dead, i.e. the heartwood is already stained dark brown.
  • Range: . Sought are the still living trees, the heartwood of which is still showing the typical light brown, noble coloring.
  • . It can be assumed that in the near future it will no longer be possible to produce Elm Burl veneer.
  • Uses: Very decorative veneer wood, high quality architectural woodwork and high class furniture making. In Central Europe mainly used as accentuating wood for decorative purposes;
  • Uses: Southern Europe due to fashion trends often also used for complete range of furniture.
  • Properties: The color of the heartwood is light to dark brown. Fine-eyed burl veneer with large dimensions and few open defects or bark pockets are sold at very high prices.
  • Machining: There is no difficulty to machining the slow grown grades with hand and machine tools. Rough pieces are difficult to plane and shape.
  • Seasoning: The burly texture calls for high care in drying to avoid degrading through surface checking & warping. The wavy texture increases the demands put on machining to obtain a smooth surface.
  • Finishing: The wood takes any surface treatment well. Filler is recommended due to the coarse texture. High gloss surfaces are extremely impressive.
  • Jointing: All wood joints with nails, screws and glue hold well although pre-drilling is to be recommended due to the tendency to split.

Maple Burl “West Coast of the United States.”

  • Similar woods: Madrona Burl, Plane Burl
  • Range: One of the Maple family, Oregon Maple is known in the USA also as Big Leaf Maple.
  • Occurrence is limited to the west coast strips of the USA and Canada with the most northern occurrence in Alaska and at the southernmost border of the Sierra Nevada mountains as well as in San Diego.
  • Range: Grows up to 1,500 m altitude and is generally found in the company of other hardwoods such as Red Alder and softwoods like Douglas Fir or Western Red Cedar.
  • Range: The leaves are red veined. Apart from the burls, which develop directly over the root, Oregon Maple has no noteworthy significance as a commercial lumber.
  • Uses: Highly decorative elements for fillings or fronts in architectural woodwork and furniture production.
  • Properties: Since Maple Burl frequently has bark pockets, sound large burls are seldom and very expensive. Almost always rotary cut
  • Machining: The extraordinary wood texture has to be taken into account when working. Perfect tools and slow machining speeds produce an attractive product.
  • Seasoning: The burl texture calls for extremely careful drying to avoid higher losses through surface checking and warping.
  • Finishing:The surface has to be given a lustrous or polished finish.

Oak Burl “Europe”

  • Similar woods: Elm Burl
  • Range: The burl growth of the 0ak is to be found mostly in the western and southwestern regions of Europe Oak Burl generally develops in isolated Oaks having sufficient space for this growth.
  • Uses: High quality interior architectural work. Unlike the more frequent Knotty Oak which is also used for mass production furniture.
  • Properties: Main quality criteria for Oak Burl are the ingrown bark which is found almost on every tree.
  • Machining: Despite itProperties: The quality of the veneer is all the better the less ingrown bark there is because it is less expensive to process then. Logs without ingrown bark are extremely rare.
  • Seasoning: Drying of Oak is an extremely slow process. There is a strong tendency for Oak towards surface checking and inner case-hardening. Only the greatest of care can ensure satisfactory drying.
  • Finishing: The surface treatment of Oak with all finishes is good and causes no problems. The use of stains should be restricted to the American Oak.
  • Jointing: Glue joints are strong and durable. Screw and nail joints hold firmly but can cause discoloration in the wood through the effects of moisture.

Walnut Burl “USA”

  • Range: The burl is only a “by-product”, the actual purpose of the tree is to grow nuts.
  • Range: To this end gigantic walnut plantations have been set up where the American Walnut (Juglans regia) is being grafted to the European Walnut .
  • Range: As a result root burl growth develops below the grafting point. After the productive capacity of the trees for nuts has been exhausted these burls are dug up as a second product and sold.
  • Uses: Highest quality interior work and furniture production. Used in larger quantities for dashboards by the automobile industry. Also used for high quality instruments in the production of upright a
  • Uses: Most desirable as solid wood for gearshift knobs.
  • Properties: Walnut burl occurs in many different forms. From head veneer and cluster to solid burl which now as before numbers amongst the most expensive and most sought after veneers.
  • Splitting often occurs within the trunk.
  • Machining: The wood is easy to work with all hand and machine tools.
  • Seasoning: The burly texture calls for extremely slow and careful drying to keep tension in the wood as low as possible.
  • Seasoning: Mechanical machining also requires the greatest of care to prevent surface fibre pick-up. The texture of the burl is highlighted best by high gloss varnishes and polishing.
  • Finishing: The very smooth surface takes all stains well, particularly water and nitro stains. The wood polishes well when fillers are used.
  • Jointing: Joints using screws, nails and glues are easy to produce and have normal tensile strength.
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