Daler Rowney FW Acrylic Ink is an acrylic-based, pigmented, water-resistant ink (on most surfaces). Daler Rowney FW Acrylic Inks come in a range of 38 colours, all of which have either a 3 or 4 star rating for permanence. Such a high degree of lightfastness over such a range of fully intermixable colours makes them ideal for use by artists in the production of pictures for permanent display.