Explanation of terminology used
Please see below the terminology used along with the corresponding explanations:
- Knot:
Part of a branch enclosed in the wood.
- Sound knot:
Knot without signs of decay and solid across its surface. The knot is at least as hard as surrounding wood and firmly held in place by growth. - Small knot:
Knot with a diameter of up to 5 mm. - Black knot:
Knot which has died due to lack of light.
- Knot:
Discoloration ranging from gray to blue, mostly appearing as stripes in the sapwood,
which is caused by fungi after entering of water; no influence on stability of wood.
Depending on location of trees – stains caused by the mineral content of the soil.
Bark which is completely or partially trapped inside the wood, usually in openings between year rings.
Cellular separation inside a wood piece, usually along the wood grain (longitudinally).
An unnaturally intense discoloration inside a tree with varying shades, intensity and uniformity, which does not diminish the hardness of the wood; appears as a feature in living trees of wood species with an irregular formation of heartwood (e.g. beech).
A prefabricated piece of wood to repair unwanted wood characteristics, for ex. knots.
Greyish discoloration spots, caused by improper use of stacking spacers while storing and kiln-drying wood.
(is avoided in Pollmeier production)
Quicklinks
Quality grades:
Beechwood, lightly steamed:
Redheart beech, lightly steamed:
Side - A
Face without visible surface defects, lamellas with or without brown or redheart, sorted for homogeneous colour
Doris Tegelkamp