duplex board paper

duplex Board paper grey back (one side coated) white back(two side coated) GRADE AA 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