Abstract
As a fundamental research for elucidation of effects of "dampening water", which is added during the usual offset printing, on the printing performance, 1H-PFGStE NMR and T2 measurements were carried out to investigate the mobility of water in model ink systems consisting of a phenol resin and oil components. Only for crosslinked systems with an aluminum chelate or abietic acid, some of the water showed a "restricted diffusion", meaning that the water is distributed in a limited region of some micron size in the polymer matrix and the water movement is confined within the region.
