Ambrotype: A photograph that creates a positive image on a sheet of glass using the wet plate collodion process.
Tintype: A photograph made by creating a direct positive on a thin sheet of iron coated with a dark lacquer or enamel and used as the support for the photographic emulsion
Heliography: The photogenic process invented by Joseph Nicephore Niepce around 1822, which he used to make the earliest known permanent photograph from nature
Daguerrotype: Photographic process in which an image is formed on a silvered metal plate, then in subdued light the plate was exposed to halogen fumes and transported to a camera via a light-tight plate holder
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