| abstract |
The present invention relates to an oil-based pigmented ink composition containing at least a pigment, a polymer compound and an organic solvent, which contains, as the organic solvent, methoxybutyl acetate in an amount of 20 to 90% by weight based on the entire ink composition; and particularly to the above oil-based pigmented ink composition, which contains, as the other organic solvent, a nitrogen-containing and/or oxygen-containing heterocyclic compound in an amount of 1 to 50% by weight based on the entire ink composition and/or a (poly)alkylene glycol derivative in an amount of 1 to 50% by weight based on the entire ink composition; and to the above oil-based pigmented ink composition, which has a flash point of 61° C. or higher, a viscosity of 2.0 to 6.5 cp at 25° C., and a surface tension of 20 to 40 mN/m at 25° C. |