An early type of photograph developed by Frederick Scott Archer in 1851. Ambrotype, popular from 1850-1870, is a direct-positive method of photography prepared by imaging a wet collodion negative on a glass plate. Originally, the plate was reversed and shown in reflected light while the image side was covered with a black varnish or black paper. Later versions used the double glass process in which the plate was not reversed but rather a backing was applied to the reverse side of the plate while a spacing mat and cover glass were added to the front (image) side. Ambrotypes have a fragile surface and the images were usually sealed in a metallic frame or case.
Sources Checked for Data in Record
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- Luis Nadeau, Encyclopedia of Printing, Photographic, and Photomechanical Processes, Atelier, New Brunswick, 1997 Comment: Frederick Scott Archer in 1851
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- Website address 1 Comment: http://amol.org.au/recollections/7/a/htm
- Wikipedia, the free encyclopedia, at http://www.wikipedia.com Comment: http://en.wikipedia.org/wiki/Ambrotype (Accessed Mar. 15, 2006)