| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide an ink composition erasable with the passage of time, in which, when the writing or coating is done on an absorbent surface such as wood, paper and plaster board or on a non-absorbent surface such as metal and glass, the hand vividly colors, but after that, with time, the colored condition spontaneously turns colorless. <P>SOLUTION: The ink composition erasable with the passage of time contains, based on a total amount of the ink composition, the following components: (i) 0.1-5 wt% leuco dye, (ii) 0.2-20 wt% developer, (iii) 0.2-20 wt% nonionic or cationic surfactant, (iV) 1-20 wt% water-soluble resin, and (V) the remainder of an organic solvent. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
