The thermal transfer printer transfers wax inks by heating them onto paper or another carrier material. The heating takes place via thermocouples, which are located on a heating bar.
The wax colours are applied to colour foils or colour ribbons. They are heated at the points, the wax liquefies and is transferred to the carrier medium. To produce colour tones, the individual colours are printed one after the other using the halftone technique and dithering. This technique is necessary because thermal transfer printers, unlike dye sublimation prin ters, cannot print halftones.color printers, thermal transfer printers operate on the CMY or CMYK color model. When printing, the ribbon with the wax colors is unwound around a set of color foils at a time.