With a 99.99 percent Jam-Free design, this multipurpose office paper offers dependable performance in all office machines, including high-speed copiers, dry-toner plain-paper copiers, plain-paper fax machines & offset duplicators. It is ideal for general copying, internal documents & backup hard copies. Good opacity allows minimal show-through from side to side. Flat, even surface allows consistent ink & toner receptivity for reliable performance. 20 lb. office paper is acid-free for archival use.