Plywood

Strong Wood is supplying only Russian fully birch plywood very often called Baltic birch plywood. The reason of calling it Baltic Birch plywood is initial supply of birch products produced from trees from the Baltic regions of Europe. Those were countries Finland, Latvia, Estonia and Russia. Later on volumes of supply of Russian birch plywood were dramatically increased. But the product is still called Baltic Birch plywood.

We supply Baltic Birch plywood because of several reasons:

  1. Birch is very strong material. Plywood made of birch is extremely hard and stable material providing extraordinary technical features.
  2. Appearance of Russian (Baltic) birch is very attractive and suitable for furniture and decoration.
  3. Holding strength of Baltic birch plywood is real good.

We supply regular Baltic birch plywood classified the following way:

By glue.
– Exterior (WBP meaning Water Boiled Proof) or
– Interior (MR meaning Moisture Resistant) glues.
In both cases formaldehyde emission is E1 and in most cases CARB Phase 2 certified

By sizes
Available sizes are:

  • 1525*1525 mm (5’*5’)
  • 1220*2440 mm or 1250*2500 mm long and short grain  (4’*8’)
  • 1525*3050 mm or 1500*3000 mm short grain (5’*10’)
  • Cut To Size is an option to be discussed

By grades
Regular grades are:
B/BB, BB/BB, BB/CP, CP/CP, CP/C sanded from two sides
C/C unsanded
Special grades and special assembly of plywood are also available.

Detailed grading rules and full quality requirements are described in GOST 3916.1-96

Simplified Russian plywood grading rules in accordance with GOST 10.55-71 and GOST 3916.1-96 are presented below:

B face

Grade B

BB grade

Grade BB

CP face 1311 x 1120

Grade CP

C grade

Grade C

10.55-71 Grade B Grade BB Grade CP Grade C
3916.1-96 Grade I Grade II Grade III Grade IV
Pin knots Not more than 3 per square meter Allowed Allowed Allowed
Sound intergrown knots Allowed with diameter not more than 15 mm Allowed with diameter not more than 25 Allowed with cracks not wider than 1,5 mm Allowed
Other knots Allowed with maximum diameter 6 mm Allowed with maximum diameter 6 mm Allowed with maximum diameter 6 mm Allowed with maximum diameter 40 mm
Closed splits Maximum length 200 mm Maximum length 200 mm Allowed Allowed
Open splits Not allowed Allowed with maximum size 200*2 mm Allowed with maximum size 300*2 mm Allowed with maximum width 10 mm
Light discoloration Allowed not more than 5% of the surface Allowed Allowed Allowed
Heavy discoloration Not allowed Not allowed Not allowed Allowed
Glue penetration (through faces) Not allowed Allowed not more than 2% of the surface of the panel Allowed not more than 5% of the surface of the panel Allowed
Veneer overlapping Not allowed Allowed with maximum length 100 mm Allowed with maximum length 200 mm Allowed
Repairing by plugs Not allowed Allowed with single plugs Allowed with double plugs Allowed with double plugs
Sanding through faces Not allowed Not allowed Not allowed Allowed