Fargo 45102 black resin (K) ribbon are monochrome (1-color) ribbons.
Monochrome ribbons are primarily used for printing text and one-color line art on one or both sides of a card.
Note: Black resin is needed to print readable barcodes.
Fargo card printers require specialized Fargo ribbons to function
properly. To maximize printed card quality and printer durability, use
only genuine Fargo ribbons.