A heavy printing paper used to cover books, make presentation folders, etc.; A heavyweight paper commonly used for covers of books, brochures, catalogs and folders; Category of thick paper used for products such as posters, menus, folders and covers of paperback books. A category of papers that are thicker, usually used as the cover of books and magazines since they are sturdier and more resistant to wear and tear.  

Paper made from pulp containing little or no acid so it resists deterioration from age. Also called alkaline paper, archival paper, neutral pH paper, permanent paper, and thesis paper.