UV lamps are positioned at various stations throughout the press to cure inks. One or more colors may be laid onto the substrate and cured at the “Inner Deck” followed by additional colors which are cured at the “Final” station. These lamps are available in various lengths, wattages per inch and spectral ranges. Over time, ink chemistry and substrate materials change which may affect spectral output and curing time. Modifications can be made to the lamps to shift the spectral output for proper cure.
Medium pressure lamps all start as Mercury with a peak output of 350 - 30nm. The spectral output can be shifted to match ink chemistry by adding such elements as Iron or Gallium. Often times the lamp must be doped for specific ink colors like white or black. Our factory has the capability of custom manufacturing doped lamps to match your specific application.
Infrared Heaters are most commonly used in smaller systems or those using aqueous coatings. Single tube heaters combining 1000W & 2000W in a staggered configuration. IR heaters are available in many sizes, wattages with various base types and configurations. Larger systems with aqueous coatings use twin tube heaters with gold reflectors in significantly higer wattages. Heaters can come in Short, Medium and Long Wave Infrared.
Xenon Short Arc lamps emit in the Deep UV range, in the vicinity of 230nm to 320nm. They are used for photochemical reactions, UV curing and lithography.
Xenon Short Arc lamps have high energy in the short wavelength region. These lamps have both the continuous spectra from the UV region to infrared region of xenon lamps and the high energy of the UV region of super high-pressure UV lamps.
Major Applications are Photochemical reactions, Lithography and UV curing.
See our pages on different Graphic Arts Processes & Technologies: