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Birch Plywood

The advantages of birch plywood are strength, flexibility and durability. Birch plywood is a relatively light material that allows it to be used in a variety of constructions and simplifies processing. The material is suitable for use in a wide range of temperatures both outdoors and indoors.

The surface of birch plywood sheet has a very beautiful natural wood texture, thanks to which this material is also widely used in interior design and various decorative solutions.

Birch plywood is a safe material for both human health and nature.

Birch Plywood is subdivided by different grades depending on face veneer quality. Plywood grade is marked by face and back veneer quality (face/back).

For example:
В/ВB (I/II), BB/BB (II/II), BB/CP (II/III), BB/C (II/IV), CP/CP (III/III), CP/C (III/IV), C/C (IV/IV)

Kasevineer sort E

Grade "E" (Elite)

Perfect grade

The highest quality grade is „E“ (Elite). Almost without any defects. This plywood is an exclusive material used in high class design projects.

Categories of defects Permissible amount of defects
Pine knots Permitted
Irregularities in the structure of wood Permitted, but slight
Coloured streaks Permitted accosionally
B sort 4 kasevineer
B sort 3 kasevineer
B sort 2 kasevineer

Grade "B" ( I )

Grade „B“ birch plywood is almost without deffects. Allowed are several pin knots and single sound tight knots. The plywood sheet has beautiful natural woodden texture.

„B“ grade plywood is Intended for natural finish. The material is suitable for covering with laquer and paint.

„B“ grade plywood is widely used for furniture production, wall panels and creation of decorative elements in interior design.

Categories of defects Permissible amount of defects
Pin knots Permitted up to 3 per 1 m²
Other knots and patched holes:

sound knots

Permitted up to an individual maximum diameter of 15 mm in amount of 5 per 1 m²
unsound (falling) knots Permitted up to an individual maximum diameter of 6 mm in amount of 3 per 1 m²
Knots and knotholes repairement Not Permitted
Irregularities in the structure of wood Permitted
Hearth and discoloration Not more than 5% of surface
Closed splits and checks, patched Permitted for an individual maximum length up to 200 mm in amount of 2 per 1 m width of sheet
Closed splits and checks, patched Permitted for an individual maximum length up to 200 mm in amount of 2 per 1 m width of sheet
Open splits Not Permitted
Discolouration and coloured streaks Permitted, but slight
Defects at the edges due to sanding or sawing Allowed up to 2 mm from the edge
Glue penetration Not Permitted
Sanding through Not Permitted
Kvaliteet S kasevineer

Grade "S"

Grade „S“ plywood is almost without defects. Occasional small sound tight knots are allowed and up to 2 patches are allowed per m2.

Grade „S“ plywood is used for varnishing and painting in furniture construction, decoration and lamination with various kind of wood.

Categories of defects Permissible amount of defects
Pin knots Permitted (diameter to 3mm)
Sound intergrown knots light/dark “Allowed up to an individual maximum diameter of 20 mm with total quantity not more than 2,5 per m2 (or total diameter up to 50mm/m2 of the panel square) 0,5”
Partly intergrown, open knots, knotholes, worm tracks Allowed up to an individual maximum diameter of 10 mm with total quantity not more than 2,5 per m2 (or total diameter up to 25mm/m2 of the panel square) 0,5
Knots and knotholes repairement Not Permitted
Irregularities in the structure of wood Permitted
Hearth and discoloration Not more than 5% of surface
Closed splits and checks, patched Permitted for an individual maximum length up to 200 mm in amount of 2 per 1 m width of sheet
Defects at the edges due to sanding or sawing Allowed up to 5 mm from the edge
Glue penetration Allowed not more than, 1% of the panel surface
Sanding through Not Permitted
Kasevineer
Kasevineer Probex
Probex Vineer
vineer

Grade "BB" ( II )

Grade „BB“ allows pin knots, some sound tight knots and also up to 8 plug repairs per m2 on plywood sheet surface.

The direction of plug repair’s wood grain complies with general direction of wood grain of entire plywood sheet, which makes plug repairs less visible.

Grade „BB“ plywood is widely used for furniture production and can be covered with different decorative materials.

Categories of defects Permissible amount of defects
Pin knots Permitted
Sound knots Permitted up to an individual maximum diameter of 25 mm in amount of 10 per 1 m²
Other knots and patched holes:
unsound (falling) knots
Permitted up to an individual maximum diameter of 6 mm in amount of 6 per 1 m²
Irregularities in the structure of wood Permitted, but slight
Open splits and patched holes Permitted for an individual maximum length up to 200 mm and width up to 2 mm in amount of 2 per 1 m width of sheet
Closed splits and checks, patched Permitted for an individual maximum length up to 200 mm in amount of 2 per 1 m width of sheet
Discolouration and coloured streaks Not more than 30% of surface
Repaired defects (inserts) Permitted up to 8 per m²
Double inserts Not Permitted
Sanding through Not allowed
Glue penetration Permitted up to 2% of surface
Defects on the edges due to sanding or sawing Admitted up to 5 mm from the edge
Männivineer
Männivineer
Männivineer

Grade "CP" (III)

Grade „CP“ allows more defects on the surface of the plywood sheet. Sound knots and plug repairs are allowed without limitations in quantity. Repairs with putty are allowed.

Grade „CP“ is suitable for construction purposes: for such applications where plywood shall not be observed and for special packaging.

Plywood calibration allows to use this plywood grade for laminating of plywood sheet with valuable veneer.

Categories of defects Permissible amount of defects
Pin knots Permitted
Sound knots Permitted along with cracks for width up to 1,5 mm
Other knots and patched holes Permitted up to an individual maximum diameter of 6 mm in amount of 10 per 1 m²
Repaired defects (inserts) Allowed
Double inserts Allowed
Irregularities in the structure of the wood Allowed
Discolouration and coloured streaks Permitted
Avatud läbivad lõhed Lubatud maksimum pikkusega kuni 300 mm ja laiusega kuni 5 mm koguses kuni 5tk/m plaadi pikkuse kohta
Open splits Permitted for an individual maximum length up to 300 mm and width up to 5 mm in amount of 5 per 1 m length of sheet
Closed splits and checks Permitted
Open joints, patched Permitted for an individual maximum width up to 2 mm and length of 200 mm, no more than 1 per metre of sheet width
Overlaps Permitted for a maximum length of 200 mm and no more than 1 per metre of sheet width
Hollows, bumps and imprints Permitted, but slight
Roughness Permitted, but slight
Inserts Unlimited number permitted
Sanding through Permitted up to an extent of 10 cm²
Glue penetration Permitted up to an extent of 5% of the surface of sheet
Defects on the edges due to sanding or sawing Admitted up to 4 mm from the edge
Männivineer

Grade "WG"

Grade „WG“ is one position lower than grade CP. Grade „WG“ allows slightly bigger knots (in diameter) and edges defects than CP grade.
Grade „WG“ is suitable for using in construction, where plywood is not observed and for special packaging.

Categories of defects Permissible amount of defects
Sound intergrown knots Allowed up to an individual maximum diameter of 65 mm
Other knots and knot holes Allowed up to an individual maximum diameter of 15 mm with total quantity not more than 10 per m2
Repaired defects (inserts) Allowed
Double inserts Allowed
Irregularities in the structure of the wood Allowed
Open splits Permitted for an individual maximum length up to 300 mm and width up to 4 mm in amount of 2 per 1 m length of sheet
Closed splits Permitted
Hearth and discoloration Permitted
Open joints, patched Permitted for an individual maximum width up to 2 mm and length of 200 mm, no more than 1 per metre of sheet width
Overlaps Permitted
Hollows, bumps and imprints Permitted, but slight
Inserts Unlimited number permitted
Sanding through Permitted up to 5% of surface
Glue penetration Permitted up to an extent of 5% of the surface of sheet
Defects on the edges due to sanding or sawing Admitted up to 5 mm from the edge
vineer
vineer 2
Männivineer

Grade "C" (IV)

Grade „C“ plywood has the lowest surface quality, which doesn’t affect however durability of the material.

Grade „C“ plywood sheet is unsanded. The manufacturing standard allows all defects including knot holes. Plywood has good gluing.

Grade „C“ plywood is widely used upholstered furniture production. Also for production of packages packaging and for building constructions that are not observed.

Categories of defects Permissible amount of defects
Pin knots Permitted
Sound knots Permitted
Other knots:
unsound knots
Permitted up to an individual maximum diameter of 40 mm in unlimited amount
Discolouration and coloured streaks Permitted
Open splits and checks Permitted for an individual maximum width up to 10 mm in unlimited length and amount
Closed splits and checks Permitted
Open joints Permitted for an individual maximum width up to 3 mm
Overlap Permitted for a maximum length of 500 mm and no more than 2 per metre of sheet width
Hollows, bumps and imprints Permitted, some
Roughness Permitted
Inserts Unlimited number permitted
Glue penetration Permitted
Defects on the edges due to sawing Admitted up to 5 mm from the edge

Export department:

Phone: +372 740 9264

GSM: +372 506 8202

E-mail: export@probex.ee

Suur-Sõjamäe põik 11, 11415 Tallinn
Mon-Fri 08:30 – 12:00 & 12:30 – 17:00