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:grey core ,or yellow core.6)Brands:FUGUIZHU,Grey Rabbit,Crystal.7)Past:ISO9001:2008,FSC,ROHS,PFOS,Halogen Testing..