Mary Evans Louis Daguerre discovers use of silver iodide in photography 12495211

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Picture No	12495211
Date	1830s
Description	Louis Daguerre discovers use of silver iodide in photography
Details	Pioneer of photography, Louis Daguerre (1787 – 1851) developed the process of the daguerreotype. One of the most significant problems which occurred during the invention of photography was getting the image to remain, to resolve this issue Daguerre concentrated on the properties of silver salts. He discovered a photographic process which involved exposing a thin silver-plated copper sheet to the vapour from iodine crystals which produced a coating of silver iodide on the surface. This plate could then be exposed with the camera to create a photograph. The engraving presents an image of Daguerre experimenting within his workshop with the silver iodide which became a crucial step in the photographic process.
Source	Figuier
Credit	Mary Evans Picture Library
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