Kuretake Brush Pen No. 14, also called the “Keitai Fude Pen Kouhitsu,” has a lush black ink capable of varying line widths depending on how much pressure is applied. This is a water-based dye ink, which means it will reactivate with water, making it easy for blending and shading techniques. Brush Pen No. 14 is a multi-tasking pen is great for all artists from graphic designers to writers.