| abstract |
[Object] The present invention relates to an oil-based ink composition used for a so-called oil-based ballpoint pen using an organic solvent as a liquid medium, and an object thereof is to provide an ink composition for an oil-based ballpoint pen with less blurring at the time of writing. [Structure] For oil-based ballpoint pens containing at least a coloring material, an organic solvent, a resin soluble in the organic solvent, polyoxyalkylene hydrogenated castor oil, and an unsaturated fatty acid having a hydrocarbon group bonded to a carboxyl group having 17 or more carbon atoms Ink composition. [Selection figure] None |