Blockx Watercolor Paint Set 6x Tubes 15ml - Primary Colors Set with 6 tubes of watercolor paint, each 15ml, from Blockx. The extra-fine watercolors by Blockx exhibit exceptional lightfastness (rating 7/8 on the international BWS scale). The watercolors are made from rare, finely ground pigments that are encased in gum arabic and honey to enhance the durability of the colors and provide them with more shine and vibrancy. They offer a glossy finish and a creamy texture.