Ambrotype-is a photograph that creates a positive image on a sheet of glass using the wet plate collodion process
Tintype-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-an early type of photoengraving made on a metal plate coated with sensitized asphalt.
Daguerreotype-The image is formed on a silvered metal plate and transported to a camera via a light-tight plate holder.
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