| abstract |
(57) Abstract: [PROBLEMS] To provide an ink composition having good adhesiveness particularly when printed on a metal vapor deposition film and having good laminate strength when laminating is performed. In a printing ink composition mainly composed of a pigment, a binder resin and an organic solvent, a number average molecular weight of 200 to 5,000, an acid value of 20 to 350, A printing ink composition comprising a hydroxycarboxylic acid having a hydroxyl value in the range of 20 to 350 in an amount of 0.1 to 10% by weight based on the total amount of the printing ink composition. |