1) Paper board good stiffness 2) Past ISO9001:2008,FSC.ROHS,PFOS, 3) Thickness:1.0mm~5.0mm 4)Usage:the grey chip paper board is widely used for stationery and paper packaging industry of gift boxes,ringbind,book cover,lever arch file production,photo frame,jigsaw puzzle,cigaretee case,wine boxes etc. 5)Color brown core,brown face,brown back 6)Brands:FUGUIZHU,Grey Rabbit,Crystal. 7)Past:ISO9001: ...