| 摘要 |
<p>PURPOSE:To obtain the subject compsn. which has such an excellent lubricity as to reduce the abrasion of a ball holder, and is excellent in durability and feeling during writing. CONSTITUTION:The objective water-base ink compsn. contains a water-sol. dye or a water-dispersible pigment, a water-sol. org. solvent, water, and at least one urea deriv. represented by the general formula: R1HNCONHR2 (wherein R1 and R2 are each 1-6C alkyl or 3-6C cycloalkyl).</p> |
