Baltic Birch, KD, Sawn Unedged Lumber
Uneged Birch lumber
· Free trim for length: about 100mm
· Thickness: 25mm, cut size is the same as invoice size
· Minimum width in the middle of board: 90mm +, no limit for maximum width
· Water ratio: 8-10%
· Sawn from birch logs which are 18cm+ in diameter where red or brown heart not exceeds 1/3 of diameter
· Grade ABC: AA/AB/BB about 90-95% and C about 5-10% (red heart only on one side) C grade allowed: red heart only on one side, knots, black knots are allowed, but dead knots are not allowed, red or brown hearts must not exceed 10% of the total board supply
· Not allowed: mechanical damage on surface, board end and surface cracks, insect damage, dead knots, rot, blue stain, waves.
Measurement: without the bark, measured by the middle width
