Made with a pure water-soluble acrylic resin, Holbein Acrylic Gouache (formerly called Acryla Gouache) is brilliant, lightfast and permanent, and moves, reacts, blends and feels like traditional gouache. However, unlike a traditional gouache which is made with a gum Arabic binder. It does not have a fragile paint film, is compatible with any water-soluble media and is waterproof when dry. It also does not shift in color tone from liquid to dry color. Ideal for artists, designers, illustrators, students and hobbyists. This 5-color set includes 20ml tubes of primary magenta, primary yellow, primary cyan, primary white and primary black.