Winsor & Newton Calligraphy inks are made from high quality pigments in acrylic. The 18 colours in this range are lightfast for long lasting results. The Winsor & Newton calligraphy inks are not water-proof, which means they can be reactivated with water. For best results use with a brush or a dip pen. All the inks have been formulated with carefully chosen pigments to ensure maximum brilliance of colour. Single pigments have been used wherever possible to make clean colour mixtures. Winsor & Newton Calligraphy Inks have been formulated to provide the artist with an unrivalled level of permanence and quality. All the Calligraphy Ink colours have a permanence rating of AA or A.