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Glass Plate Negative

Glass plates were used as negatives in two separate photographic processes during the 19th century: the wet plate and dry plate collodion processes. Glass plates had two advantages over paper negatives in that they yielded a high level of detail and withstood numerous printings. But glass plates were also fragile and often difficult to work with. Glass was used for negatives from the 1850s through the 1920s before being replaced by film.

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