What is paperboard?
Paperboard is a thin and flat material in sheet form made up from an interlaced network of cellulose fibres.
It is usually made in several layers, combined together in the wet state. A white mineral pigmented coating is applied in one or more layers, on one or both surfaces, enhancing whiteness and smoothness and providing a surface for printing and varnishing. The main raw material for paperboard is cellulose, the basic organic matter of wood. The fibres are derived from different kinds of trees, mainly pine, spruce and birch. Also eucalyptus is used. The process by which the fibres are separated from wood is known as pulping. Fibres derived directly from wood are known as “primary” or “virgin” fibres.