| abstract |
(57) [Summary] [Purpose] In addition to basic performance such as storage stability, adhesion to plastic films, water resistance, printability, etc., water-based plastic films with excellent post-processing suitability such as laminating and boil / retort treatment. To provide a printing ink composition. [Structure] A colorant, an aqueous resin emulsion, and a hydrazine-based crosslinking agent having at least two or more hydrazine residues in the molecule are essential components, and the aqueous resin emulsion is a radical-polymerizable monomer (A1) having a specific composition. Obtained by emulsion-polymerizing a radical-polymerizable monomer (A2) having a specific composition in an alkali aqueous solution of an alkali-soluble resin obtained by copolymerizing the above-mentioned compound with a keto group in the alkali-soluble resin and / or the emulsion polymer. A water-based printing ink composition for plastic films, which contains a specific amount of and / or an aldo group. |