| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an ink composition for an erasable inside core type aqueous marking pen, without having the sedimentation of a pigment in its inside core, without causing color separation on writing, excellent in dispersion stability of the pigment and capable of seeing characters written on a white board from any of angles. <P>SOLUTION: This ink composition for the erasable inside core type aqueous marking pen is provided by containing at least a pigment, a water soluble resin, emulsion of a releasing agent, a thixotropic agent and water, having≥45 mPa s viscosity, when a stress at 20°C is 0.01 Pa, and also≤12 mPa s viscosity, when the stress is 10 Pa. The composition exhibits effects, without causing the sedimentation of the pigment in its inside core, without causing the color separation on writing, excellent in the dispersion stability of the pigment and capable of seeing the characters written on the white board from any of angles. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
