OXIDATION POLYMERIZATION-TYPE OFFSET PRINTING INK COMPOSITION, MANUFACTURING METHOD FOR OXIDATION POLYMERIZATION-TYPE OFFSET PRINTING INK COMPOSITION, AND PRINTED MATTER

摘要

Provided is an oxidation polymerization-type offset printing ink composition that exhibits an excellent balance between press stability, stain resistance and oxidation polymerization properties, even when the amount of organic solvent used is drastically lower than conventional compositions.　The oxidation polymerization-type offset printing ink composition comprises varnish, a vegetable oil, an organic solvent, an extender pigment, and a water-soluble hydrophilic substance that exhibits a thickening effect when added to water. The oxidation polymerization-type offset printing ink composition satisfies the following conditions (1)-(5). (1) The varnish tolerance value is 3-30(mL/3g). (2) The vegetable oil content is 20-50mass%. (3) The organic solvent content is 0-30mass%. (4) The extender pigment content is 0.1-15mass%. (5) The hydrophilic substance content is 0.01-2.5mass%.