... ,protect your healthy4. Exactly humidity control,more clear & flat when printing 5. With white&smooth paper,can cross the machine smoothy ... at one time.6. Double used,high-speed copy,laster printing,ink-paint printin etc.The best choice for the office paper ... through-print both sidesBeen developed for: Photocopy Machines, Laser Printers, Ink-jet Printers, Fax Machines