INK COMPOSITION AND INK JET RECORDING METHOD USING SAME

摘要

Provided is an aqueous ink jet-use ink composition which exhibits quick drying properties on a recording medium with low water-absorbing properties, exhibits good printed matter durability, is subject to few discharge defects such as printing head nozzle clogging or curved discharge, and exhibits excellent discharge properties. The present invention includes a binder resin, a surfactant, a pigment, a solvent and, if necessary, a pigment-dispersing resin. The binder resin has a glass transition temperature of 40-90°C and is dispersed as resin emulsion particles. The value of A, which is defined as the sum of the product of the acid value and the content in terms of parts by mass of the binder resin and pigment-dispersing resin, is 0-200 mg KOH/g. The surfactant is a non-ionic compound represented by formula (1), and the content of solvents having boiling points of 250°C or higher contained in the solvent is less than 5 parts by mass relative to 100 parts by mass of the ink composition. R1O-(R2O)n-H (1) (R1 is a straight-chain or branched chain alkyl group having 12-22 carbon atoms. R2 is an ethylene group or propylene group. n is an integer between 10 and 50.)