Winsor & Newton Professional Watercolours are still formulated according to their founding principles; to create unparalleled colours which offer artists the widest and most balanced choice of pigments, as it was in 1835 when William Winsor and Henry Newton introduced the first moist watercolours to the world. Available in 108 luminous colours and used by artists such as Turner and Sargent. Each professional Watercolour is formulated using only the purest pigments to ensure performance and permanence. Size: 5ml.

Cobalt Blue is a clean blue pigment. It was discovered in 1802 by French chemist Louis Thénard as an alternative pigment to the expensive Lapis Lazuli blue pigment. Series 4.