Unique high quality illustration pen with bendable brush tip. Pigment Arts from German Staedtler is a series of brush pens that contain a completely new ink technology consisting of highly advanced pigments.The ink used in the brush pens is pigmented India Ink, which Staedtler has chosen to call Multi Ink. The ink combines colour brilliance and extreme lightfastness in an innovative way. The ink results in colour reproduction on a wide range of surfaces, even after long exposure to light. Pigment Arts is permanent and fully waterproof. The ink is water-based and does not bleed through the paper. They adhere to a wide variety of surfaces, including metal and glass to name a few. The colour is very quick-drying on all surfaces. This is a really fun and innovative pen to illustrate with! The body of the pen is made from 97% recycled plastic. Store the pens horizontally when not in use.