The Ambrotype, the wet plate Collodion process or the Collodion positive, a process which was first introduced in early 1850's. Although the process was wide spread and not uncommon, the first man to patent the process was James Ambrose Cutting in 1854, the "Ambrotype" was born.
The process itself was similar to the Daguerreotype, except instead of polished metal, varnished glass was used. One side of the smooth clean glass was blackened and varnished and the other side was made light sensitive with a mixture of Collodion and silver nitrate. The emulsion side had to be exposed while the collodion/silver nitrate was still wet. Once developed and fixed, the emulsion side had another piece of glass placed over as protection and then sealed together in a metal case or frame. A beautiful image would be formed, with light bouncing off the blackened background making your negative image appear positive. The thickness of the glass also played a part in adding depth to the image.
Although this process took over from the Daguerreotype, as it was cheaper, it was only short lived. By late 1850's the Ambrotype made way for processes like Tintype.
http://en.wikipedia.org/References
Image: http://en.wikipedia.org/wiki/File:Ambrotype.jpg
no known author. (2009). Wet-Plate Process Details.Available: http://www.thedaglab.com/daguerreotype-process-details/wet-plate-collodion-process/. Last accessed 5 Aug 2009.















By Anderson & Low








