GRADE NATURE
The natural beauty of birch is structured in the ”Nature” flooring grade. It makes a room look modern, whilst emphasizing the preference for natural materials. This flooring grade has different colors and tones intensity, which make any room brighter and more lively. Flooring can be with or without bevels.
SPECIFICATIONS
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Description of defect as per GOST 2140-81 |
Grade |
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Select |
Nature |
Country |
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Intergrown knots, light and dark |
Not allowed |
Allowed up to 20mm in diameter |
Allowed up to 30mm in diameter |
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Black knots and particially intergrown, light and dark |
Not allowed |
Allowed up to 10mm in diameter |
Allowed up to 20mm in diameter |
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Heartwood
|
Not allowed |
Allowed in a form of strips of light tint up to 40% from plank surface |
No limits |
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Face shake (among other things in watermarks and heartwood) |
Not allowed |
Not allowed |
Allowed with width of no more than 1mm and with length no more than 50mm |
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Cracks in knots |
Not allowed |
Allowed with width of no more than 1mm and with length no more than 20mm |
Allowed with width of no more than 1mm and with length no more than 30mm |
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Curly grain |
Not allowed |
Allowed |
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Pith |
Not allowed |
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Inbark
|
Not allowed |
Allowed with width of no more than 3mm |
Allowed with width of no more than 5mm |
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Discoloration |
Not allowed |
Allowed |
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Mineral deposits |
Allowed single strips with width no more than 1mm |
Allowed |
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Watermark |
Not allowed |
Allowed in a form of thin strips |
Allowed |
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Worm holes |
Not allowed |
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Wane |
Not allowed |
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Processing defects(flakes, chips, scores, tear, flay marks) |
Not allowed |
Allowed single up to 0,5mm in depth |
Allowed single up to 0,5mm in depth |
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Burning |
Not allowed |
Allowed |
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Hit and miss areas |
Not allowed |
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