| 摘要 |
PROBLEM TO BE SOLVED: To provide an eraser-eliminable ball point pen water base ink composition giving a hand writing which does not peel off by fretting to such an extent of touching with a finger and can easily be eliminated by fretting with an eraser. SOLUTION: An eraser-eliminable ball point pen ink composition comprises water, a pigment and/or colored polymer particles as the colorant, a resin having a glass transition temperature or a minimum film-forming temperature of 0-40 deg.C and an agent for imparting shear thinning property, and shows a viscosity at 25 deg.C by an EM type rotational viscometer at 100 rpm of 25-160 mPa.s and a shearing viscosity-reducing index of 0.1-0.7. |
