Provided is an ink composition for an aqueous ballpoint pen making it possible to draw sharp and fine lines which are less likely to be blurred at an initial part of writing and are written smoothly and which are clear at stop, jump and sweep parts to provide beautiful characters. The ink composition for an aqueous ballpoint pen contains at least water and a colorant and having a dilatant fluid characteristic in at least a part of a region of a shear rate of 1 to 383 s-1 (25°C).
                            本发明提供了一种
水性圆珠笔用墨
水组合物,可绘制出锐利的细线,这些细线在书写初始部分不易模糊,书写流畅,在停止、跳跃和扫过部分清晰,从而提供漂亮的字符。用于
水性圆珠笔的墨
水组合物至少含有
水和
着色剂,在剪切速率为 1 至 383 s-1 (25°C)的区域中至少有一部分具有膨胀流体特性。