An illustration set ideal for Manga cartooning. Pitt Artist Pens offer odorless, permanent and waterproof inks that will not bleed through paper. The pigmented India inks are lightfast, acid-free and pH Neutral. They work beautifully on all types of papers and canvas, permanent on porous surfaces. Ideal for sketches and studies in ink. Convenient wallet provides storage for "on-the-go" artists. Store horizontally when not in use.