Price: 10.00
The use of solvent free UV- (Ultraviolet) and EBC- (Electron Beam Curable) printing inks
leads to a remarkable reduction in VOCs in the environment and at the working place.
For a radiation curable ink it is a must that the color shade, the brilliancy and the lightness
of the print does not change after irradiation or - if it changes - the change must be in an
acceptable range. The main point of this pigment screening was how the electron beam
affects the color shade of a print. For the judgement of a potential change a colorimetric
system was used to rate the change by a physical means.
1.0 Basics of the EB-technology
Electrons which are emitted from a cathode gun are accelerated in a vacuum by an
accelerating voltage of - here - 150 keV to an anode. These very fast electrons emerge
through a thin metal ,,window", pass the gas layer between the ,,window" and the printed
substrate and hit the ink.. The electrons which penetrate the ink film cause polymerisation
reactions as a result of the partial absoption of energy by the used vehicle system. (l).
2.0 Radiation curable printing inks
