... coverMaterial, Features and Service:1 PP is a eco-friendly material and pupular in most developed and developing countries2 Non-poisonous ... human body3 Water-proof, light weight, save material, can be recycled use, good material to replace paper covers4 Suitable for covering book ... searching and development of high-tech 3D, 2D, PVC/PP material printing and PP/PVC plastic goods making, such as PP ...