These new colors are made from densely concentrated pigments. New Permalba? Oils are formulated with refined linseed and safflower oils, minimizing after yellowing and promoting maximum film flexibility. The most lightfast (ASTM Lightfastness I) modern pigments have been used, creating an entire line of Lightfastness I colors (excluding iridescent colors, which are not yet rated). Traditional pigments with low lightfastness have been replaced with contemporary alternatives, giving the artist the same traditional hues so richly prized but with superior color retention.