Blockx Watercolor Paint, Cyan Blue - Large Pot 18ml. The range of extra-fine watercolors from Blockx consists of 72 vibrant shades, all of which exhibit an exceptionally high lightfastness (rating 7/8 on the international BWS measurement scale). The extra-fine watercolors from Blockx are primarily made from pure monopigments. No fillers or additives are included. The watercolors are made from rare, very finely ground pigments that are coated with gum arabic and honey to enhance the durability of the colors and give them more shine and vibrancy. They offer a glossy finish and a creamy texture.