Pitt Artist Pens are pigmented India Ink that is both acid-free and archival (pH neutral).  Pitt Artist Pens are available in three fine art colours: Black, Sepia and Sanguine.  Also available in four expressive nib widths: Superfine, Fine, Medium and Brush.  Smudgeproof and waterproof when dry. Our ink contaians the highest quality pigments for unsurpassed lightfastness (resistance to fading).