Developed by Holbein to offer the same high pigment quality and archival characteristics of Holbein's Artists' Oil line while allowing soap-and-water cleanup, Duo Aqua Oils are characterized by rich hues, high chroma, and excellent resistance to light. - Holbein Duo Aqua Water Soluble Oils - Set of 12, Elite Colors, 20 mlHolbein Duo Aqua Water Soluble Oil Color, ELITE 20ML 12/CLR SET - Traditional pigment paints, including real cadmiums and cobalts, are brought together in this set of 12 Duo colors including Spinel Black, Anthraquinone Red, Cadmium Red, Yellow Ochre Natural, Cadmium Yellow, Phthalo Green, Cadmium Green, Cobalt Blue, Ultramarine Deep, Phthalo Blue, and Imadazalone Brown in 20 ml (0.67 oz) tubes, plus a 50 ml (1.7 oz) tube of Permanent White.