Definition: A collodion wet-plate process in which the emulsion was coated on a glass plate. The negative image produced was visible as a positive image when the glass was backed with a dark material.
Definition: Mid-19th century photographic process introduced in 1851-52 by Frederick Scott Archer and Peter Fry. It used weak collodion negatives which were bleached and backed by a black background which produced the effect of a positive image.
Definition: Mid-19th century photographic process introduced in 1851-52 by Frederick Scott Archer and Peter Fry. It used weak collodion negatives which were bleached and backed by a black background which produced the effect of a positive image.
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