USE - Ink has always been an interesting medium for artists and graphic artists. It lends drawings expression and durability. | SMOOTH - The point of the pen glides softly and effortlessly over paper. | IDEAL - PITT artist pens are best for sketches, drawings, layouts, fashion design and illustration, due to the very pigmented and lightfast ink. | ACID-FREE - The permanent Indian ink is acid-free which makes its archival quality. You can feel confident that the ink will last for a long amount of time on your important documents and papers. | PREMIUM - Faber Castell are globally renowned and loved. They are the world leading manufacturer in top-quality, innovative art materials. They have become the go-to brand for artists for centuries, whether professional or hobbyist.