The correct answer is Ribbon.?In the process of thermal transfer printing, the ribbon is run between the label and the print head, with the coated side of the ribbon facing the label. When the ribbon and label pass over the print head, the print head heats up the ribbon's coating to transfer image to the surface of the label.Additional Information Thermal printing (or direct thermal printing) is a digital printing process which produces a printed image by passing paper with a thermochromic coating, commonly known as thermal paper, over a print head consisting of tiny electrically heated elements.The coating turns black in the areas where it is heated, producing an image.Most thermal printers are monochrome (black and white) although some two-color designs exist.Thermal transfer printing is a different method, using plain paper with a heat-sensitive ribbon instead of heat-sensitive paper, but using similar print headsThermal printers print more quietly and usually faster than impact dot matrix printers.They are also smaller, lighter and consume less power.?