| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide colored resin particles which have a smaller specific gravity than those of conventional colored resin particles and can stably exist in ink, to provide a writing tool ink composition which can be applied to a wide writing tool range such as various marking pens and ballpoint pens, has excellent temporal stability, and has rich practicality, and to provide a writing tool using the same. <P>SOLUTION: The colored resin particles for ink are characterized by containing a colorant, and microcapsules having a specific gravity of≤1 and prepared by covering an internal substance with wall films. The writing tool ink composition is characterized by dispersing the colored resin particles for ink in a vehicle. An eraser-erasable writing tool ink composition comprises the colored resin particles for ink and adhesive resin particles, and contains the colored resin particles and the adhesive resin particles in a total amount of≥70 wt.% within a particle distribution of 2 to 20μm. <P>COPYRIGHT: (C)2005,JPO&NCIPI</p> |
