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.
Greyish discoloration spots, caused by improper use of stacking spacers while storing and kiln-drying wood.
(is avoided in Pollmeier production)
Face without visible surface defects and sorted for homogeneous colour
Back side without visible surface defects, but not sorted according to colour
Face without visible surface defects, lamellas with or without brown or redheart, sorted for homogeneous colour
Back side without visible surface defects, lamellas with or without brown- or redheart