WINSOR & NEWTON COTMAN Cotman brushes are a range of pure synthetic water colour brushes of the highest quality that have been created using the same skills, generated over many years, as those used in making the finest sable brushes. The secret of the Cotman brush lies in the fibres. By blending fibres of differing thickness we achieve the three most important qualities sought after by the artist. The thicker fibers contributr strength and spring whilst the thinner fibers improve colour carryling capacity, which have recently been improved by 50%. Together they retain a perfect point, time after time.