Holbein Duo-Aqua Oil is an artist quality water-mixable oil paint made with watersoluble linseed oil. It has all of the handling characteristics of traditional oil paints, but can be thinned or cleaned up with just water. These paints have a uniform drying time, retain brushmarks for rich painterly textures, and dry to a lustrous sheen just like traditional oils. Duo-Aqua is available in over 80 colors, 75 of which offer optimum permanence. These colors are free of pigments derived from heavy metals.