| 摘要 |
<p>PURPOSE:To obtain a water-base dye ink for a ballpoint pen which is stably and smoothly delivered without causing intermittent or unsmooth flow during writing and has such an excellent stability as not to discolor even after a long storage. CONSTITUTION:This ink contains a colorant contg. at least one blue dye selected from C. I. Acid Blues 9, 90, 93 and 103, at least one arom. amine of the formula or its deriv., and water. In the formula R1 and R2 are each H, hydroxyl, optionally substd. amino, 1-3C alkoxy, phenyl, aminophenyl, or 1-3C alkyl provided they are not simultaneously amino, phenyl, aminophenyl, 1-3C alkyl-substd. aminophenyl, or 1-3C alkoxy-substd. aminophenyl.</p> |
