Product Name:450g sheets packing stock lot duplex board paper with gray backSubstance:230g-500g Usage :printing and packagingFeature:stabilize gsm, high stiffness and good smoothness Size:by customer requirementGrade:AAA,AA,ASample:free in A4,freight collectedCertificationISO:9001: ISO4001Payment/Package:D/P,L/C,CAD,T/T,Western UnionDeliver Time:15 days after downpayment Coated duplex board is a type of boxboard with a glossy coated surface on one side for superior printability. 1. Standard weight, high stiffness, good coating surface and smoothness.2. Outstanding paper stiffness is a strong support for carton laminating and die-cutting. 3. Good surface decoration feature assures excellent calendaring, hot-stamping and laminating result. 4. With the advanced operation idea and international standard production quality insurance1. The coating is smooth, clean and neat, it can adapt the multicolor and high speed printing  2. With high performance corrugating medium and linerboard for the outer layer of corrugated board. 3. Good smooth and thickness,widely used and supplied in printing and packaging of food, wine, toy, drug,   shoe boxes and others.