Impact of Ink/Paper Interactions on Printability of Aqueous Publication Gravure Inks, Part II. Sorption of Liquids by Paper during Ink Setting and Drying

Liquid transport behavior of water and water based varnishes in contact with paper was studied using different experimental techniques (electrical, optical and the Fibro 1100 DAT Dynamic Absorption Tester). It was found that the Dynamic Absorption Tester delivers very useful information about liquid spreading, but not liquid sorption for very short times of contact (t<1 sec.) Interactions of polymer ink binders with paper substrate are of great importance for printability and ink drying. The amount of water drained from the wet ink film into the substrate during the time needed for the ink to travel from the nip into the dryer depends very strongly on the chemistry of the system (ink and paper). Filtration theory can be used to describe the process of water drainage from a liquid ink film into a substrate.