| abstract |
PROBLEM TO BE SOLVED: To provide an oil-based pigment ink composition which is excellent in safety and odor, can be printed on a low-cost film printing medium such as vinyl chloride without a receiving layer, and can withstand an outdoor use environment. In an oil-based pigment ink composition comprising at least a pigment, a polymer compound having a solubility in water and ethanol of less than 3% by weight at 25 ° C., and an organic solvent, the flash point is 55 to 120 as the organic solvent. At least one selected from dipropylene glycol monoalkyl ether monoalkyl ester, tripropylene glycol monoalkyl ether monoalkyl ester, dipropylene glycol dialkyl ether and propylene glycol dialkyl ester having a boiling point of 170 to 250 ° C. An oil-based pigment ink composition comprising 40 to 90% by weight of the (poly) propylene glycol derivative in the total ink composition. [Selection figure] None |