| abstract |
PROBLEM TO BE SOLVED: To have excellent safety and odor, which are problems in ink compositions using an organic solvent, can be printed on a low-cost film printing medium such as polyvinyl chloride without a receiving layer, and is used outdoors. Provided is an oil-based pigment ink composition that can withstand the use environment. In an oil-based pigment ink composition containing at least a pigment, a polymer compound, and an organic solvent, a dipropylene glycol monoalkyl ether having a flash point of 55 to 120 ° C. and a boiling point of 170 to 250 ° C. is used as the organic solvent. At least one (poly) propylene glycol derivative selected from monoalkyl esters, tripropylene glycol monoalkyl ether monoalkyl esters, dipropylene glycol dialkyl ethers and propylene glycol dialkyl esters is contained in an amount of 40 to 90% by weight in the total ink composition. An oil-based pigment ink composition comprising: [Selection figure] None |