Zebra 800012-445 YMCK 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. Zebra 800012-445 YMCK ribbons are used for printing a combination of full-color images and one-color text or barcodes. Zebra card printers require specialized Zebra ribbon to function properly. To maximize printed card quality and printer durability, use only genuine Zebra ribbons.