Blockx Watercolors, decorative box with 16 half pans, box made of enameled steel, protected by a felt cover. With Blockx watercolors in half pans. The extra-fine watercolors from Blockx have an exceptional lightfastness (rating 7/8 on the international BWS measurement scale). The watercolors consist of 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 brilliance. They offer a glossy finish and a creamy texture.