Patent ID: 7897657

Claim:
An inkjet ink comprising: an organic solvent, a pigment and a vinyl chloride-vinyl acetate resin, wherein the organic solvent is a mixed solvent comprising a lactone compound and at least one compound selected from the group consisting of a compound represented by a formula (1) and a compound represented by a formula (2), and a quantity of the lactone compound is within a range from 1 to 40% by weight relative to a total weight of the ink: CH 3 CO(OR 1 ) m OR 2 (1) wherein R 1 represents an ethylene group or propylene group, R 2 represents an alkyl group of 1 to 4 carbon atoms, and m represents an integer from 1 to 3, CH 3 CH(OH)COOR 3 (2) wherein R 3 represents an alkyl group of 1 to 8 carbon atoms.