Blockx, watercolour paint, permanent orange - tube 15ml The range of extra-fine watercolour paints from BLOCKX consists of 72 luminous shades, all of which have exceptionally high light fastness (grade 7/8 on the international BWS measuring scale). The extra-fine watercolour paints from BLOCKX are largely made from pure monopigment. Neither fillers nor additives are added. The watercolours consist of rare, very finely ground pigments coated with gum arabic and honey to increase the durability of the colours and give them more shine and luminosity. They offer a shine and a creamy texture.