NO.

Test projects

Stander (high-class product)

Test value

1

Allowable deviation of  width

relaive to working width

±0.6%

-0.1%

relative to the average size

±0.5%

0.0

Allowable deviation of  length

Relative to working width

±0.6%

-0.2%

relative to the average size

±0.5%

0.0

2

Deviation of thickness

±5%

-1%~+1%

3

Rectangularity

±0.5%

0.0~+0.1%

4

Edge Curvature

±0.6%

0.0~+0.3%

5

Warping degrees

±0.5%

0.0

6

Center Curvature(%)

±0.5%

0.0~+0.2%

7

Water absorption

average

6≤E≤10%

9%

minumum

≤11%

10%

8

Breaking Strength(N)

≥800N

1278N