Collodion process

(redirected from Collodion Emulsion)
(Photog.) a process in which a film of sensitized collodion is used in preparing the plate for taking a picture.

See also: Collodion

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Although it appears to be an instantaneous exposure, the silvery sheen on the rapidly flowing river betrays the slow speed of the wet collodion emulsion and provides a clue that the train was stopped on the bridge for the exposure.