| 摘要 |
PROBLEM TO BE SOLVED: To provide an oily ink composition for ballpoint pens whereby even if writing is made with a ballpoint pen on a paper surface stained with thick sebum, an ink composition is prevented from being adsorbed to the sebum to cause blurred handwriting.SOLUTION: An oily ink composition for ballpoint pens at least comprises a colorant, an organic solvent, and a polyoxyethylene triisostearate hardened castor oil of 0.1-20.0 wt.%.SELECTED DRAWING: None |
