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 F panel is a fluorescing panel that allows you to print grayscale text or images that are only visible with ultraviolet (UV) light. The K panel is a black resin panel, typically used for printing text and barcodes.
NGYMCFK YMCFK ribbons are used for printing a combination of full-color images and one-color text or barcodes.
The F panel in the ribbon provides an economical way to include an effective anti-counterfeit security feature that is difficult to forge.