| 摘要 |
<p>PURPOSE:To prepare an ink compsn. with which characters or lines, easily erasable with water, can be written clearly with a good adhesion on a black or dark object by finely dispersing a water-sol. powder in a nonaq. solvent and dissolving a specific water-sol. resin in the resulting dispersion under a specific condition. CONSTITUTION:A water-sol. powder (e.g. glucose) is finely dispersed in a nonaq. solvent (e.g. ethyl cellosolve), and a water-sol. resin (e.g. hydroxypropylcellulose) is dissolved in the resulting dispersion in an amt. corresponding to or lowe than its solubility.</p> |
