| 摘要 |
<p>PURPOSE:To provide the titled ink which has excellent drying resistance, dry-up resistance and restoration and whose handwriting can be easily erased with cloth or soft paper, consisting of an alcohol solvent and/or glycol solvent, a coloring material, a resin and two specified additives. CONSTITUTION:An alcohol solvent (e.g. n-butanol) and/or glycol solvent (e.g. propylene glycol) (A), a coloring material (B) (e.g. carbon black or Lake Red C), a resin (C) (e.g. polyvinyl butyral resin), 0.2-2wt% sucrose (D) (e.g. mono-,di- or triester of sucrose and stearic acid) as an additive, 3-8wt% higher fatty acid ester (E) such as an ester derived from a 12-22C higher fatty acid and a 1-8C lower aliph. alcohol, as an additive, and optionally dispersant for pigment, surfactant, preservative, etc. are mixed and dissolved.</p> |
