For over 175 years Winsor & Newton have been dedicated to providing artists with the widest possible choice of colours. Made from the finest pigments in the highest concentrations possible and offering the greatest possible permanence together with good handling qualities, this range of superior water colours is sure to bring vibrant colour to any watercolour painting. Winsor & Newton Artists" Watercolours are available in both tubes and pans. Generally tube colours are preferred by artists using large quantities of colour, whilst pans generally find favour with beginners, outdoor sketchers and artists using smaller quantities. Color number/code: 319 Series number: 1 Chemical description: Nickel dioxine, Benzimidazolone Color index name: PY 153, PO 62 Color index number: 48545 Permanence rating: A ASTM lightfastness rating: II Transparency/Opacity: T