Durability Testing

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Plywood grades

Grade 1 (B)
1

1 (B) grade

1 (B) grade is almost without defects, only a few sound knots with a diameter of up to 15 mm are allowed

Grade 2 (BB)
2

2 (BB) grade

2 (BB) grade allows patches on the surface of the sheet. Knots and open defects are repaired with veneer inserts

Grade 3 (CP)
3

3 (CP) grade

3 (CP) grade allows partly accrete, single and loose knots with a diameter of no more than 6 mm in the amount of 10 pcs. per 1 m² of the sheet surface

Grade 4 (C)
4

4 (C) grade

4 (C) grade allows many manufacturing defects, a strong gluing is guaranteed

Plywood Deck – Taber Test results (Durability)

Machine: Taber Model 503

Method: determination of coating abrasion resistance

Samples received: 25th July 2024

Date of testing: 7th August 2024

Product: Birch Plywood covered with thermal reactive filming, thickness 18mm, coating density 120g/m2

Taber Test Machine

On average, Plywood Deck can be used in 50 cycles of cement pouring

Series, sample # Number of turns Coating abrasive resistance
(IP), coating begins to wear off (FP), coating completely wears off Z = (IP + FP)/2 * f, number of table turns The overall look after abrasion test
1 375 950 578 95 percent of the image was erased
2 350 975 578 95 percent of image erased
3 400 1000 611 95 percent of image erased
4 425 1025 633 95 percent of image erased
5 400 975 600 95 percent of image erased
6 425 1000 622 95 percent of image erased
7 400 1025 622 95 percent of image erased
8 350 1000 589 95 percent of image erased

Correction factor f = 0.87