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Historical Photographic Processes Collection Series
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Series contains examples of tintypes, collected from various sources.Tintypes, sometimes referred to as ferrotypes or melainotypes, are direct positive images created with sensitized collodion on a metal (iron) surface that has been coated with la...

Wet plate negatives

Series contains wet plate collodion negatives, a process usually credited to William Scott Archer , in wide use between 1851 and 1885. The process uses light-sensitive silver halides in collodion on a glass base and the negatives needed to be expo...