reduction firing

Reduction firing is a pottery technique where minerals like iron oxide are exposed to a limited supply of oxygen in a kiln, causing chemical changes that alter the glaze's color. For example, iron can turn from a natural reddish-brown to a deeper, smoky black or greenish hue. This process creates unique, varied surface effects and rich colors in ceramics. Managing oxygen levels carefully during firing allows potters to achieve specific visual results, making reduction firing a vital technique for producing expressive, dynamic glazed finishes.