1.both side grey 2.made of recycle pulp 3.Good stifness 4.Can laminated with many kinds of paper 1.Equipment specifications:1) Can be made in sheet or in roll(Grammage above 350gsm and under 650gsm can be made in roll .)2) Tightness: 0. 54-1.00mm 2.Product line:1)Grey chip board2)Grey board (both side grey)3)Single-side grey board4)Grey board laminated with Black card , white card , kraft paper ...