Anything interrupting the smooth flow of a wood surface. This includes loose knots, splits, voids, wormholes, bark pockets and others.
Loose knots, splits, voids, wormholes, bark pockets, and other flaws that interrupt the smooth flow of a wood surface.
The most common defects includes knots, worm holes, bird pecks ( bark pockets), wane, stain, pith, checks, unsound burls, shake and split.
Irregularities appearing on finished paper that spoil the appearance or cause weaknesses in the sheet.
any irregularity or imperfection on a tree, log, or other wood product that reduces the volume of usable wood or lowers its durability, strength, or utility value. Defects may result from knots and other growth conditions and abnormalities; from insect or fungus attack; or from logging, or other processing procedures.