Sakura's Pigma Brush was specifically developed to meet the needs of calligraphers and free-hand artists who require a fine point, flexible, brush-style nib. The ink is quick-drying, waterproof, fade-resistant, and of archival quality. It will not smear once dry. Pigma Brush is capable of drawing very fine lines or very broad strokes. Change the width of the line simply by changing the pressure applied to the nib.