Character: Course texture and prominent grain having wide color variations and minor knots. Flame pattern is permitted. There are tint differences between the parquet stripes. Knot: Up to 2-3 knots having a diameter of 10-15 mm are permitted per stripes, except for black knots. Cracked knots are permitted when corrected by filling. Sapwood: Healthy sapwood is permitted up to the third of the slat width, even from both sides.
According to the EN 13489 standard, 3 % of a different grade than indicated is acceptable.