Quality A
“Eyes” are allowed – small knots up to 4 mm in diameter.

Quality B
Sapwood is not allowed. Sound dark knots up to 10 mm in diameter are allowed.

Quality C
Discoloration is allowed. Sound and dark knots up to 50 mm in diameter are also allowed. Open knots up to 30 mm are allowed.

Quality D
Discoloration is allowed. Sound and dark knots up to 70 mm in diameter are also allowed. Open knots up to 40 mm in diameter are allowed. Sapwood up to 10 mm in width is allowed. End crack on 1 or 2 sides up to 300 mm is allowed.

The factory is producing 35 000 square meters of oak lamellas every month with the following dimensions:
Thickness: 3.2/4.4/5.3 mm
Width: 155/175/192/205/255/305 mm
Length: 1020 – 3020mm
Humidity: 7-9%