The Effect of Emulsification Ratio on Ink-Transfer Performance and Printing Quality of UV Offset Ink

Abstract

The emulsification ratio of ink has an important effect on ink-transfer performance and printing quality. The UV offset ink of gold and silver cardboard was prepared by three-roll grinder. Ink was emulsified by adding different amounts of water and the ink samples with different emulsification ratio were made. Printability tester was used to proof, test the ink transfer performance, set up Ink transfer equation, confirm the parameters of f’，b and k, and investigate the influence of emulsification ratio on ink-transfer performance. Test the solid density, dot gain and relative contrast value of proofs, analyze the effect of emulsification ratio on printing quality. The research results show that when the ink of plate was large, the amount of ink transfer and the volume of ink on the plate are basic in a linear relationship. When the emulsification ratio of ink is 11.76%, the value b, the solid density and relative contrast value are the biggest. When the emulsification ratio of ink is 6.25%, the value f’ is the biggest. The dot gain is the smallest while the emulsification ratio is 15.67%.