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|1. (WO2013146192) WATER-BASED INK COMPOSITION FOR BALLPOINT PEN|
|Applicants:||MITSUBISHI PENCIL COMPANY, LIMITED
|Title:||WATER-BASED INK COMPOSITION FOR BALLPOINT PEN|
Provided is a water-based ink composition for a ballpoint pen having excellent writing stability without leading to writing defects such as smudging and the like. A water-based ink composition for a ballpoint pen in which the oil phase, in relation to the water phase, is in an oil-in-water emulsion, wherein the oil phase or the oil phase and the water phase contains a colorant, and the oil phase includes a fatty acid with 6 to 22 carbon atoms, as one component that constitutes the oil phase.