In the realm of card printing technology, there are two primary options: direct-to-card and retransfer. Direct-to-card technology, the more prevalent method, entails printing images directly onto the surface of cards. Conversely, retransfer printing, also referred to as HDP printing, involves printing images onto a clear HDP film that is then heat-sealed onto the card surface. While both methods yield high-quality images, they differ significantly:
Direct-to-card printers are susceptible to card imperfections, resulting in: (1) Incomplete coverage of the card surface, leaving a thin white border around the edges of printed cards due to the printhead avoiding contact with card edges. (2) Challenges in printing on technology cards, as printing near raised areas like contact chips can risk printhead damage and cause inconsistent print quality due to the uneven card surface.
Retransfer printers, however, are less affected by card imperfections. Since the printhead does not directly contact the card, the risk of printhead damage is minimized. This technology enables full coverage of the card surface, allowing safe printing on various card types including proximity cards, smart cards, pre-punched cards, and key tags.