| 摘要 |
<p>PURPOSE:To obtains a marking ink compsn. having excellent drying resistance on the nib of a pen, by blending a dye, an org. solvent, a resin soluble in said solvent and a polyglycerol fatty ester. CONSTITUTION:A compsn. consists of a dye, an org. solvent, a resin soluble in said solvent and a polyglycerol fatty ester of the formula (wherein R is acyl, H; n is 0 or an integer). Said polyglycerol fatty ester precipitates out simultaneously when the dye and the resin precipitate by the evaporation of the org. solvent on the nib of a pen, and hence a firm bond between the dye and the resin is prevented from being formed and the formation of a complete film is inhibited. Thus, a very brittle film is formed on the surface of the nib. Accordingly, further evaporation of the org. solvent is prevented and the film is broken by ordinary writing pressure, thus enabling usual writing to be conducted.</p> |
