Evolis R3011 YMCKO ribbons consist of yellow (Y), magenta (M) and cyan (C) panels for printing a full spectrum of colors by combining the colors using varying degrees of heat. The K panel is a black resin panel, typically used for printing text and barcodes and the O panel is a thin, clear protective overlay. Evolis R3011 YMCKO ribbons are used for printing a combination of full-color images and one-color text or barcodes. The Evolis R3011 ribbon is specially designed to guarantee optimum operation of your badge printer without risk of damage. To maximize printed card quality and printer durability, use only genuine Evolis R3011 ribbon.