| 摘要 |
<p>PURPOSE:To provide the titled ink which gives clear, fast handwriting which can be erased by a special eraser, by incorporating a compd. having stringiness and a compd. capable of making said compd. compatible with ink in a specified developer/colorless dye system ink. CONSTITUTION:In a developer/colorless dye system ink composed of a developer consisting of a novolak type phenolic resin and a colorless electron-donating org. compd. (e.g. Crystal Violet Lactone), capable of developing a color by said developer, dissolved in a solvent consisting of an arom. alcohol (e.g. benzyl alcohol) and/or ethylene glycol monophenyl ether, the titled ink is characterized in that polyvinylpyrrolidone (A) imparting stringiness to ink and resorcinol and/or catechol (B) making component A compatible with ink and acting as a developer are dissolved therein. This ink gives handwriting which is dense and clear, has little dim spot, and can be easily erased by a desensitizer composed of a polar compd. such as an alcohol.</p> |
