1 striped
2 striped
3 striped

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.

Character: Course texture and prominent grain having rather dynamic colors but without harsh color variations, with bigger knots. Flame pattern permitted, in a minor degree. Major tint differences may occur between the parquet stripes.
Knot: Up to 4-5 knots having a diameter of 20-25 mm are permitted per stripes, except for black knots. Cracked knots are permitted when corrected by filling. Fallen-out knots are permitted, up to 25 mm in diameter, when corrected by filling.
Sapwood: Fundamentally, it is not permitted, but healthy tangential sapwood, up to 4-5 mm in width and 50 cm in length, is permissible.

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.

Character: It is characterized by the sapwood and the knots, as well as its prominent textural and color variations. Flame pattern is permitted.
Knot: 5 – 6 healthy and dark knots – even grouped ones – are permitted in each stripe, up to a diameter of 25 – 30 mm. Fallen-out knots are permitted, up to 30 mm in diameter when corrected by filling.
Sapwood: Healthy sapwood is permitted up to the third of the slat width, even from both sides.

Character: It is characterized by the knots and the prominent textural and color variations resulted from the discolorations near the pith. Flame pattern is permitted.
Knot: 5 – 6 healthy and dark knots – even grouped ones – are permitted in each stripe, up to a diameter of 40 – 50 mm. Fallen-out knots are permitted, up to 40 mm in diameter when corrected by filling.
Sapwood: Not permitted

Character: Its color is defined by the natural growth of the tree – with darker and lighter stripes. Without any particularly striking, harsh textural and color variations.
Knots: Healthy knots up to a diameter of 3 mm, and dark knots up to a diameter of 1 mm are permitted, except for those in groups.
Red heartwood: Not permitted.

Character: It is characterized by accentuated colors, red heartwood, knots and a vivid texture.
Knots: Healthy knots up to a diameter of 20 mm or fallen-out knots up to a diameter of 10 mm are permitted, 2 per stripe.
Red heartwood: Permissible, up to the 2/3 of the stripe.

Character: Unclassified quality. Its tints and texture are the result of natural growth. Featuring few knots and practically no sapwood. There are significant variations in grain pattern and tint between individual parquet stripes, and has a characteristic yellowish deposition in the pores.
Knot: Permitted, up to a diameter of 10 mm.
Sapwood: Tangential sapwood is permissible, up to a few mm in width.

Character: Unclassified quality. Colorful, knotty material with sapwood and an expressed grain pattern. There are significant variations in grain pattern and tint between parquet stripes.
Knot: Knots are permitted, up to a diameter of 40 mm, even filled up.
Sapwood: Permitted, up to the one third of the width.