Aqua Brique is a solid water-soluble block of color that can be used on various surfaces such as paper, cardboard, canvas and wood. The convenient pocket-sized tin includes 10 half-briques with an expanding sponge. These extremely lightfast intense pigments can be diluted with water to use with an airbrush, or used as watercolor half-cakes. They have spectacular luminosity on dark surfaces and adhere to non-porous surfaces. The set includes cadmium yellow, permanent dark yellow, orange, carmine extra fine, magenta, sky blue, Prussian blue, emerald, sienna natural and ivory black.