Faber-Castell Pitt Artist Brush Pen Big Brush 4ct Black 199 Pitt Artist Pen Big Brush has 4 times more ink than the traditional Pitt Artist Pen. India ink is lightfast, waterproof, permanent, odorless, acid-free and pH neutral. The pens work beautifully on all types of papers and canvas, permanent on porous surfaces. Great for large format artwork. Store horizontally. Box of 4