| 摘要 |
An oil-based ball-pen ink composition which comprises a) a colorant, b) a solvent ingredient comprising as the main solvent at least one solvent having the following chemical formula (1)(wherein R<1>, R<2>, and R<3> each independently is hydrogen or CH3), and c) a resin soluble in the solvent ingredient and has a viscosity at 25 DEG C of 700 to 8,000 mPa•s, preferably 800 to 6,000 mP a s, excluding 6,000 mPa•s. In one embodiment thereof, the main solvent is a mixture of the at least one solvent and propylene glycol monomethyl ether.
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