1.top grade wood pulp/recycle pulp 2.good stiffness 3.perfect surface 4.Past ISO9001-2008,FSC,SGS,SDS test Grey paper board,grey chipboard1.top grade wood pulp/recycle pulp2.good stiffness3.perfect surface4.Past ISO9001-2008,FSC,SGS,SDS test More details:1) Can be made in sheet or in roll . (Grammage above 300gsm and under 650gsm can be made in roll .)2) Tightness: 0. 62-0.65gsm 3) Moisture ...