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Silver
Silver is a metallic element and the most reactive of the noble metals, which also includes platinum.
Conventional photography is based on the sensitivity of silver halides — binary compounds — to light. A black and white photographic image is comprised of microscopic particles of metallic silver suspended in a gelatin emulsion.
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In its metallic form silver is relatively stable, but it is readily oxidised or attacked by sulfur compounds.
The National Film and Sound Archive of Australia acknowledges Australia’s Aboriginal and Torres Strait Islander peoples as the Traditional Custodians of the land on which we work and live and gives respect to their Elders both past and present.