DIGITAL ADVANCED LITHOGRAPHY IMAGING INKS WITH IMPROVED CURABLE PERFORMANCE, IMAGE ROBUSTNESS AND PROCESSES THEREOF

摘要

An ink composition useful for digital offset printing applications includes acolorant anda high viscosity thickening agent. A process for variable data lithographicprinting includesapplying a dampening fluid to an imaging member surface; forming a latentimage by evaporatingthe dampening fluid from selective locations on the imaging member surface toform hydrophobicnon-image areas and hydrophilic image areas; developing the latent image byapplying an inkcomposition comprising an ink component to the hydrophilic image areas, theink compositioncomprising a high viscosity thickening agent to raise the viscosity of thecomposition from about1.05 to about 2 times higher while maintaining excellent transfer to asubstrate at lowtemperatures.