Character: Natural colors, prominent grain without harsh color variations. It features minor knots. Flame pattern is permitted only in traces. Tint differences may occur between the parquet stripes. Knot: Knots, up to a diameter of 3 mm are permitted, except for black ones and those in groups. Sapwood: Fundamentally, it is not permitted, but healthy tangential sapwood, up to 3-4 mm in width and 20-30 cm in length, is permissible.
According to the EN 13489 standard, 3 % of a different grade than indicated is acceptable.