The daguerreotype The daguerreotype was the first commercially successful photographic process in the history of photography. Named after the inventor, Louis Jacques Mandé Daguerre, each daguerreotype is a unique image on a silvered copper plate. The daguerreotype is a direct-positive process, creating a highly detailed image on a sheet of copper plated with a thin coat of silver without the use of a negative. The process required great care. The silver-plated copper plate had first to be cleaned and polished until the surface looked like a mirror. Next, the plate was sensitised in a closed box over iodine until it took on a yellow-rose appearance. Calotype The calotype was a photographic process in which negatives were made using paper coated with silver iodide.In this technique, a sheet of paper coated with silver chloride was exposed to light in a camera obscura; those areas hit by light became dark in tone, yielding a negative image. ...
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