UV-curing printing inks comprise the fastest-growing market segment in the printing industry. The rapidly growing demand for low-emission products and the high processing capabilities of UV inks are contributing to the steady growth of UV-curing printing inks in the market.
Creating black UV-curing printing inks poses significant challenges. As carbon black typically absorbs UV radiation, this can cause problems with curing the ink properly. Additionally, the surface chemistry and structure of the applied carbon black also have a strong effect on the rheology of the printing ink. As a rule, the finer the pigment, the higher the viscosity of the printing ink. Carbon black pigments that have been surface treated and those, with low structures, give lower viscosity.
To meet these challenges, Orion has developed processes that carefully calibrate and adjust the choice of pigments, the amount of photo-initiators, wetting agents, the composition of the binder, and the intensity of the UV-radiation to give the optimum properties.