| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an aqueous ink composition for writing utensils, which has a small average particle diameter, and gives satisfactorily enough line density even when the content in ink is reduced. <P>SOLUTION: This aqueous ink composition for writing utensils contains a microencapsulated pigment including at least a leuco dye represented by formula (I), a developer and a color-change temperature regulator. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
