paperboard
paperboard, material similiar in shape and composition to paper, but generally thicker, stronger, and more rigid. Paper machines, e.g., Fourdrinier machines, are used to make sheets of paperboard. Sometimes these machine-made sheets are pasted to each other or to paper sheets to build up special thicknesses. The function of a particular type of paperboard is often indicated by its name, e.g., boxboard. Paperboard can be made into a wide variety of items, including folding cartons, advertising displays, electrical insulators, and coasters.
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paperboard