Holbein Duo Aqua Oils were created to have the same handling qualities and characteristics of oil colors while being non-toxic and easy to clean up. A combination of the finest quality pigments and linseed oil that has been treated with a surfactant (surface active agent); Holbein Duo Aqua Oils can be treated as traditional oils. In fact, it is recommended that paintings created with Holbein Duo Aqua Oils be left to dry for approximately 6 months before varnishing, just like traditional oil paintings. Use with Holbein Duo Aqua Oil Mediums for myriad possibilities. When only water is used the Aqua Oils will dry with a slight matte finish in less time than traditional oils mixed with an oil medium. This set of 11 (15ml) tubes + 20ml Permanent White includes: Cadmium Red Deep Hue, Vermilion Hue, Lemon Yellow, Cadmium Yellow Light Hue, Cadmium Green Light Hue, Cadmium Green Hue, Ultramarine Light, Cobalt Blue Hue, Yellow Ochre, Burnt Sienna, Ivory Black, and a 20ml Permanent White.