The light's wavelengths must be correctly matched to the ink's photochemical properties.
As a result, the ink droplets move to a higher viscosity state, but stop short of full cure.
UV pinning enhances the management of drop size and image integrity, minimizing the unwanted mixing of drops and providing the highest possible image quality and the sharpest colour rendering.
Challenge: Overcome the wetting problems that were causing UV-Curable inks to spread and cause ink droplets to bleed into each other before full curing single-pass digital printing of narrow web labels.
Solution: A UV pinning system that uses high power UV light emitting diodes (LEDs) installed next to the inkjet array (print head).