| abstract |
An ultraviolet radiation curable ink is provided, which doesnnot make the printed image hazy or blurred, and does not drip ornleak from the ink container or printing drum, hence being excellentnin both printability and operability. The ultraviolet radiationncurable ink comprises an ultraviolet radiation curable resinnmonomer or oligomer as a varnish, and the ink has a viscosity ofn2.0 to 13.0 Pa·s measured at a shear rate of 100 (l/s) at 23°C,nand has an yield value of 25 Pa or higher at 23°C. The ink canncontain a viscosity regulator, for example, as a powder. It isnpreferable that the content of powdery ingredients in the ink isn30 wt% or less based on the total weight of the ink. |