disclosed is a water - based printing ink composition exhibiting excellently low foaming behavior with sustainability even under adverse conditions of high temperature and intense shearing force encountered in the printing works . the printing ink composition comprises , besides an organic polymer as the binder resin in the form of an aqueous solution or emulsion and a coloring agent , e . g ., dyes and pigments , a silicone - based defoaming composition comprising a polyoxyalkylene - modified polydiorganosiloxane , polydimethylsiloxane , finely divided silica filler and organopolysiloxane resin mainly or solely consisting of monofunctional organosiloxane units and tetrafunctional siloxane units each in a specified weight proportion .