This Big Brush Pen contains four times the amount of pigmented India Ink than the PITT Artist Pen, offering ample coverage for work in large formats. The ink is smudge-resistant and waterproof when dry. This pen has a large tip for both wide full strokes and narrow detailed strokes. Ideal for sketches, journals, cartooning and fine ink drawing, this pen is blendable while wet for a variety of effects and permanent when dry - great for layering.Details:Available in multiple colorsIndia inkAcid-freeLightfastWaterproof when dryDurable, strong tip