1. Cardboard weight of m2 / gr 400 +/- 12 2. Thickness, mm 0,58-0,62 3. Moisture, % 6-8 % 4. Stiffness by statistic folding in crosscut direction, N/cm 0,7-1,0 5. Plybond strength, N 170-190 6. Surface absorbability Cobb gr/m2 200 7. Breaking strength by repeated foldings in crosscut direction, min 40 8. Bursting strength kPa, min 800 |