Magicard ribbon prints a full spectrum of colors by combining yellow, magenta and cyan panels and using varying degrees of heat. The K panel is a black resin panel, typically used for printing text and bar codes, and the O panel is a thin, clear protective overlay. YMCKO Full-Color Ribbon yields approximately 300 prints in Magicard 300 Card Printers.Magicard ribbon prints a full spectrum of colors by combining yellow, magenta and cyan panels and using varying degrees of heat. The K panel is a black resin panel, typically used for printing text and bar codes, and the O panel is a thin, clear protective overlay. YMCKO Full-Color Ribbon yields approximately 300 prints in Magicard 300 Card Printers.