IDEAL – Ink lends drawing and expression and durability and can be combined with other drawing techniques. This calligraphy pen is ideal for creative letterings, letter art, fashion design, illustrations and more. 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. ACID-FREE – The high quality permanent Indian ink is archival and acid-free. It is free from odours and is pH neutral. DESIGN – Faber Castell calligraphy pens were developed with professional hand lettering artists. The 2.5mm line width is ideal for hobby artists. WATER-PROOF – The ink is water-resistant and incorporates high quality pigments with unsurpassed lightfastness.