Hoover Burnt Siennas are naturally occurring Brown Iron Oxides, which can range in color from a medium reddish brown to a deep mahogany. As with all Iron Oxide Pigments, Burnt Siennas are permanent and light fast. They possess excellent heat stability and are chemical resistant. Burnt Sienna is a transparent pigment and often used to produce reddish-brown colored furniture finishes, such as Cherry, Mahogany and Rosewood. Hoover offers a variety of seven standard Burnt Siennas.