| 摘要 |
<p>PURPOSE:To provide the titled ink which has specified viscosity and surface tension and whose handwriting can be well retained on a non-absorbent surface and can be continuously peeled off in the form of a film, consisting of an org. solvent, a strippable resin binder and a dye and/or a pigment. CONSTITUTION:5-20wt% strippable resin binder having an average degree of polymn. of 1,000 or below such as polyvinyl butyral resin and 3-30wt% dye and/or pigment are dissolved or dispersed in an org. solvent such as ethanol to obtain ink for writing utensils, which has a viscosity of 60cps at 25 deg.C and a surface tension of 20-35dyne/cm.</p> |
