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: Having basically no knots, this material has a nearly uniform color effect with tint differences between the parquet stripes.
Knot: Knots having the same color as the background, up to 3 mm in diameter are permitted. Black knots and grouped knots are not permitted.
Red heartwood: Not permitted.
Brownish, spindle shaped discolorations: Up to 20 mm in length and 2 mm in width, are permitted in small numbers.

Character: Knotty material with few red heartwood, characterized by varied colors and grain pattern. Brownish spindle shaped discolorations, up to 50 mm in length and 10 mm in width, are permitted. Color differences and banding, resulting from steaming and drying, are permitted
Knot: 2-3 healthy and closed knots per stripes, up to a diameter of 25 mm, are permitted. Cracked knot, corrected by identical colored filling, is permitted. Dark knots are also 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: This material has a natural texture and a nearly uniform color effect with tint differences between the parquet stripes. Small numbers of resiny, spindle shaped discolorations, up to 20 mm in length and 2 mm in width, are permitted.
Knot: Healthy knots having the same color as the background, up to 3 mm in diameter are permitted, except for grouped ones.
Red heartwood: Not permitted.

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.

Character: Unclassified quality. There can be significant tint variations between individual stripes. Contains knots.
Knot: Knots are permitted, up to a diameter of 15 mm, even filled up.
Sapwood: Not permitted.

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

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. Diverse color effects resulting from natural growth, with dynamic texture.
Knots: Well intergrown knots up to a diameter of 25 mm, 2 per stripe are permitted. Fallen-out knots up to a diameter of 10 mm, 3 per stripe are permitted.
Sapwood: Permitted up to the one third of the width if its color is not whitish, but similar to that of the background.