Red iron oxide

Red iron oxide is widely used to obtain shades ranging from red to brown in glazes and ceramic pastes. Its color varies depending on the temperature and firing atmosphere, potentially generating effects from intense reddish tones to deep blacks in a reducing atmosphere. In addition to its function as a pigment, it also acts as a flux in some formulations, improving the melting and vitrification of the pieces. It is used in the production of earthenware, stoneware, and porcelain, providing warm and earthy finishes. It is an essential material for achieving natural and expressive effects in ceramics.