Paperboard are paper materials with high thickness, normally over . It might be built up of one or several plies and's often used in packaging materials. See also Cardboard which's a generic, non-specific, lay term used to refer to any heavy paper pulp based board. Properties Thickness, bulk and caliper are significant aspects to paperboard manufacture, as the end product must be able to withstand the bending forces of packaging, load carrying, shipping etc., while still maintaining their shape.… (More on Paperboard)