Multipurpose paper in Express Pack is designed to run in small & large offset presses, copiers, laser printers, inkjet printers & fax machines that use plain paper. Express Pack stores paper in sheets instead of separating it into reams for easier access. 99.99 percent jam-free paper is acid-free for added archival quality that extends the life of your document. With ColorLok technology, ink dries up to three times faster to prevent smudges. Black ink is up to 60 percent bolder while color is up to 30 percent more vivid. 20 lb. paper also offers high opacity for minimal show-through. Use for copies, memos, forms, manuals, reports, plain paper faxes & more.