水すい性せいペン

noun

water-based pen

A pen that uses water-based ink, such as a felt-tip pen or a water-based marker. Often contrasted with oil-based pens.

• 水すい性せいペンで書かいた文も字じは水みずに濡ぬれるとにじみやすい。

  Characters written with a water-based pen tend to bleed easily when wet.

• このイラストは水すい性せいペンで色いろを塗ぬりました。

  I colored this illustration with water-based pens.