Duplex board paper

Basis Weight

GSM

230

250

300

350

400

450

500

Weight Range

(gsm)

±10

±10

±10

±10

±10

±10

±10

Thickness

(m/m)

0.28±0.02

0.31±0.02

0.37±0.03

0.43±0.02

0.5±0.02

0.56±0.02

0.62±0.02

Density

(g/cm3)

≤0.8

≤0.8

≤0.8

≤0.8

≤0.8

≤0.8

≤0.8

Moisture

(%)

5.8±1.0

6±1.0

6.5±1.0

7±1.0

7.5±1.0

8.0±1.0

8.5±1.0

Gloss

(%)

85

85

85

85

85

85

85

Brightness,Whiteness

(%)

≥82

≥82

≥82

≥82

≥82

≥82

≥82

Smoothness

(s)

≥100

≥100

≥100

≥100

≥100

≥100

≥100

Coating Weight

(g/m2)

36

35

35

35

35

35

35

Dispersion of basic weight at

landscape orientation

(%)

6.8

7.0

7.5

8.0

8.5

9.0

9.5

Sizing

(g/m2)

15-20

15-20

15-20

15-20

15-20

15-20

15-20

Stiffness Taber(MD)

(mN.m)

≥2.1

≥2.9

≥4.1

≥6.3

≥9.0

≥12.1

≥15.6

Stiffness Taber(CD)

(mN.m)

≥13.5

≥14.5

≥17.1

≥20.0

≥24.8

≥30.1

≥36.5

Folding endurance

(times)

≥10

≥10

≥10

≥10

≥10

≥10

≥10

Absorption capability of ink

(%)

18-23

18-23

18-23

18-23

18-23

18-23

18-23