Recently reformulated to bring artists the same unequaled quality as Permalba white. All colors are densely pigmented with a lightfast rating of 1 (excluding iridescent colors). Lighter shades with safflower oil binder to minimize yellowing. New formulations with carefully selected pigments that yield clear, crisp hues without muddying when mixed with white or other colors. They carry an ACMI seal and each tube is labeled with pigment content, lightfast rating and opacity information.