Monochrome Black ribbons are great for printing simple cards with barcodes or text. The "r" in KrO stands for resin. With these ribbons, a printing process called thermal transfer is used, which creates crisp lines and clear text absent shadows. KrO ribbons are a great choice for printing barcodes because they can be easily read by barcode readers.

Compatible Printers
Zebra ZXP Series 3 ID Card Printer

Panel meaning:

Kr - Black Resin

O - Overlaminate