Selection

Saw cut

The radial saw cut is the saw cut, by which the plane of cut passes through the core wood along the tangent to the annual ring of the trunk. The tangential saw cut is the saw cut, by which the plane of cut passes at the distance from the core wood, along the tangent to the annual ring of the trunk. The wood of planks from radial saw cut is rather homogeneous due to the color and texture, the dimensions between the rings are minimal, and the tangential saw cut has the expressive texture and rich wavy picture of annual rings. The planks of radial saw cut are resistant to external effects, they do not practically undergo the deformation and possess high wear resistance. The output of planks from radial saw cut is 10-15% from the total volume; therefore, their cost is very high.

The wood rays are the channels along which the moisture with nutrients along the whole height of the tree is drained from the center of the trunk to the periphery, when the tree is alive. The wood rays look like “twisting flattened worms” due to their shape. Pursuant to the external dimensions the wood rays can be from the dimensions of the thin thread and up to the size of human finger (old, “long-standing” wood), and due to the length they can extend from the core wood and up to the rind itself. The radial saw cut without wood rays does not exist.

The texture is a natural picture, formed by fibers and layers of wood and stipulated by the peculiarities of its structure. It depends on the location of wood fibers, visibility of annual rings, color gamma of wood, quantity and dimensions of wood rays.

The flaws of wood are the natural defects of some wood sections, which reduce its quality and restrict its usage, for example, knots, sapwood (the full list of flaws is provided in GOST2140-81 on the site http://www.wood-win.ru/gost/gost-2140-81.asp).

The knots are the bases of branches, put into the wood of the trunk: the most wide spread and inevitable flaw of wood. The wood of knots differs with darker color and it has the independent system of annual rings.

The sapwood is the periphery part of tree trunk, which differs with the lighter color from the inner part (core). This flaw occurs on the butt ends in the form of one or some rings with different widths, which are lighter than the surrounding wood; on lateral surfaces – in the form of strips of the same color.

Selection

Sort – Radial (EI- Rad )

The parquet planks without differences, expressed in the color of wood. The parquet planks of radial saw cut. The wood rays are allowed on the planks. The flaws of wood and defects from processing are not allowed.

It is not allowed to have such flaws on the front face: knots: strong light, strong dark, strong group ones; eyes, cross grain (roe) – more than 5%; core, double core; bark pocket open single-sided; sapwood fungous colors; chemical color; cracks; mottle; frost heart; rottenness, blunt wane; split; pit; scratch; burn; lack of milling; strong light inner sapwood.

It is not allowed to have such flaws on the back side: knots: strong light, strong dark, strong group ones; cross grain (roe) – more than 5%; rottenness; blunt wane; lack of milling.

Sort – Select (EI-S)

It is allowed to have the difference due to the color of wood in the parquet planks. The parquet planks of semi radial and tangential saw cuts.

It is not allowed to have the following flaws on the front face: knots: strong group ones; core, double core; bark pocket open single-sided; sapwood fungous colors; chemical color; cracks; mottle; frost heart; rottenness, pit, scratch, lack of milling; strong light sapwood; blunt wane, split.

It is allowed to have the following flaws on the face side: knots: strong with diameter of up to 3 mm – 1 piece per plank, eyes: 1 piece per plank, wood rays.

It is not allowed to have the following flaws on the back side: curly grain, rottenness; split; lack of milling.

It is allowed to have the following flaws on the back side: knots: strong light – single with the diameter of up to 10 mm; strong dark; strong group ones; eyes; cross grain (roe) – more than 5%; core, double core – not more than 1/3 from thickness of plank; sapwood fungous colors; chemical color, mottle; blunt wane – not more than 1/5 from the length and width of plank, cleaned from rind and bass; bark pocket open single sided – with the depth of not more than 1/3 from thickness of plank.

Sort – Natur (EI-N)

It is allowed to have the difference due to the color of wood in the parquet planks. The parquet planks of radial and tangential saw cuts. It is allowed to have the wood rays, strong light sapwood along the whole length of not more than 5 mm.

It is not allowed to have the following flaws on the front face: knots: strong group ones; core, double core, bark pocket open single-sided; cracks, mottle, frost heart, blunt wane, split; pit; scratch; burn; lack of milling.

It is allowed to have the following flaws on the front face: strong light – with diameter of up to 10 mm – 1 piece per plank, strong dark – with diameter of up to 3 mm – 1 piece per plank; eyes – up to 2 pieces per plank; cross grain; sapwood fungous colors, chemical color – with width of up to 5 mm.

It is not allowed to have the following flaws on the back side: rottenness; lack of milling.

It is allowed to have the following flaws on the back side: knots: strong light, strong dark, strong group ones; eyes; cross grain (roe); core; double core – not more than 1/3 from thickness of plank; bark pocket open single-sided – with depth of not more 1/3 from thickness of plank; sapwood fungous colors, chemical color; mottle; frost heart.