Winsor newton professional water colour offers artists the widest and most balanced choice of pigments with the greatest possible permanence. The brilliance, transparency and purity of colour is unparalleled to any other water colour. Since 1832 when henry newton and William Winsor introduced the first moist water colours to the world, much of Winsor newton's reputation for supreme quality has stemmed from the professional water colour range. Each colour within this wide and balanced spectrum of 109 colours, has been selected and formulated to offer the greatest choice so that artists can use a unique palette that best suits their work. With 80 single pigment colours in the range, Winsor and newton offer the widest range of modern and traditional pigments for clean colour mixing. The transparency of wn professional water colour is achieved by their unique process of pigment dispersion during manufacture. The natural characteristics of each pigment highlights the paints transparency level. 106 out of 109 colours in the professional water colour range are classed as 'permanent for artists' use'. This means that 97 percent of our professional water colour are rated aa or a for permanence to ensure that the colours used today will appear the same for generations to come. The professional watercolour range offers a wide and balanced spectrum of colours in half pans, whole pans and in 5ml, 14ml and 37ml tubes.