BLOCKX Artist watercolours have been made according to the same base formula since 1865. Manufactured by hand, BLOCKX Artist Watercolours are made using only lightfast pigments and the finest traditional ingredients to provide stability because watercolour is a naturally fragile medium. Prepared with a modern formula, the colours are slowly ground on stone tricylinders to simulate the manual process and accentuate the individual quality of each colour. The pigments are very finely ground, coated with gum Arabic and honey to strengthen the resistance in time of colors and give them more brightness and luminosity.