Photograph on baryta* paper stretched on aluminum panel
*A barite or barium sulphate (BaSO4) coating applied to some photographic paper. A clay-like natural compound, Baryta is traditionally put on the raw fibrous paper prior to coating with the light-sensitive emulsion layers. Think of it as a sizing that increases the white ground and brightness of the print. It also prevents other chemicals absorbed on the fibers of rag or cellulose paper from infiltrating the emulsion layers, creating greater detail and definition, a richer tonal range, and improvement to the paper’s archival properties.