Faber-Castell Creative Studio Manga kits feature Pitt Artist Pens conveniently packaged for on-the-go artists. Pitt Artist Pens contain permanent, smudge-proof, and waterproof inks that will not bleed through most papers. The archival-quality, pigmented India inks are odorless, lightfast, acid-free, and pH Neutral. Smudge and waterproof when dry.