burl

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burl

1. a small knot or lump in wool
2. a roundish warty outgrowth from the trunk, roots, or branches of certain trees

burl

A decorative pattern in wood caused by adjacent knots. See also: Wood

Burl

 

a distinctive excresence of the trunks, branches, and roots of leafy and, more rarely, coniferous trees. Burls apparently develop as a result of the damage done to trees by fires, fungi, and pasturing cattle. They appear where there is an overabundance of shoots and where dormant buds and adventitious buds grow closely together. In these areas of the tree there is also an intense development of cordate rays with the formation of tracheidal flexures and wood fibers (cross-grained wood). The wood in a burl grows 1½ to 3 times faster than the normal wood of a tree; it is also heavier and harder. The planes exposed after cutting have beautiful patterns. Burls are used by joiners, carvers, and turners as material for the production of small articles. The wood from burls is also used for veneers. Walnut burls, which reach a diameter of 1.5-2 m, are particularly valuable. In the USSR, walnut burls are found mainly in Middle Asia and, occasionally, in the Caucasus. Birch, linden, and alder burls are used in the production of particularly small items.

burl

[bərl]
(botany)
A hard, woody outgrowth on a tree, usually resulting from the entwined growth of a cluster of adventitious buds.
(materials)
In lumber or veneer, a localized severe distortion of the grain that is generally rounded in outline.

burl

1. An abnormal growth or protuberance on a tree. Also called knur, knurl.
2. Wood veneer cut from burls.
References in periodicals archive ?
If the burl works brought to mind John Cage (who was an avid mycologist), specifically his famous dictum that art should "imitate nature in her manner of operation," here the generative possibilities of mimesis took a backseat to the spectacle of living organism as readymade.
Also known as vavona burl, redwood burl yields an especially dramatic and varied collection of figures.
with headquarters near Mendocino, CA, san typical uses for redwood burl include inlay and marquetry.
Dr Burls added that Ms Sandercock described her health as 'reasonably fit'.
Vaida says walnut burr is perhaps the most popular with his clients, although he has had requests recently for redwood burl.
If you understand the finish techniques and get a handle on them, you can get some truly beautiful effects out of redwood and redwood burl.
The finished mappa burl is spectacular stuff; burls typically have a lot of action going on.
Causes of burls are imperfectly understood and the following reasons have been advanced to explain this unusual growth: injury from frost, fire or mechanical contact; and irritation of the cambium by bacteria, fungi, and possibly viruses.
When in the burl form, narra's wood is usually referred to as amboyna burl - that name coming from Amboyna Island, another place the trees can be found.
One of the more recognizable patterns from Populus nigra is mappa burl, a highly figured burl.
The dictionary defines burl as an abnormal wart-like growth or excrescence, often produced by stooling.
Any other burls are usually freaks among walnuts and not as common.

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