Faber-Castell Pitt Artist Pens are 100% India Ink. The ink is lightfast and permanent when fully dry on porous surfaces. Unlike other art pens or markers, Pitt Artist Pens are non-toxic and odorless.They are extremely fade-resistant, archival, acid-free, smudge proof and waterproof when dry. 

Pitt Artist Pens are not marketed as fabric pens. If used on fabric, it should be displayed as artwork and not washed. Due to the nature of the fabric, washing may cause the ink to fade.

Pitt Artist Pens are not refillable, nor are the tips replaceable.