| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain a water-base ink for writing utensils which maintains drying resistance and lubricity, and has such excellent characteristics that it hardly causes blurs and strikes-through. SOLUTION: There is provided an ink comprising at least a colorant, water and a vinyl pyrrolidone-vinyl acetate copolymer represented by formula (I) wherein m+n is 50 or more and 50,000 or less, and 1.0>m/(m+n)>=0.3.</p> |
