Warm air is produced in a heating register in order to maintain the temperature level and to peel off the solvent from the surface. Therefore warm air is applied on the film surface at high speed via a blow opening with optimised nozzle function.
A combination of radiation in the infrared area and warm air aims to bring energy into the wet water film that needs to be cured. The energy input causes the acceleration of the evaporation process, while a defined air circulation and extraction provide for the secure removal of the released water.
They effect a fast energy supply and hence a fast heating of the ink film. 0.9–2.9 µm (peak width at half-height) is the typical wavelength area of medium-wave IR radiators.
In contrast to IRM radiators, carbon radiators effect a stronger warming near the surface of the wet film. 1.1–3.7 µm (peak width at half-height) is the typical wavelength area of carbon radiators.