A picture taken on a plate of prepared glass, in which the lights are represented in silver, and the shades are produced by a dark background visible through the unsilvered portions of the glass.
Photographic process in which wet collodion glass negatives are underexposed and made to appear positive by the inclusion of a black background. (Referred to as collodion positives on glass in England.)
( collodion positive) a unique positive photographic process used primarily in the 1850s, a collodian negative on glass, the image produced is whitish in tone but when placed over a black opaque surface appears as a positive; often hand colored portraits.
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.
A photograph made by exposing a glass plate treated with light-sensitive wet collodion. The negative was made positive by backing with black paper or paint.
an underexposed, wet collodion negative, mounted against a dark background to appear as a positive image
a photograph taken on a piece of glass
a wet-plate collodion positive image made on glass, also one of a kind
An underexposed and then developed collodion negative on glass which is then backed with an opaque coating to appear as a positive. Similar in size and packaging format to the daguerreotype, with without the surface reflections. Easier to tint and faster and cheaper to make and sell than daguerreotypes, they rapidly replaced daguerreotypes in the late 1850s. (Baldwin, 8)
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.
This process was in general use from 1855 to around 1865. It is a positive, silver image on glass. Due to the fragility of the glass backing ambrotypes were put in cases similar to those used for daguerreotypes. Although often confused with a daguerreotype, an ambrotype will always appear as a positive no matter the angle of view. A daguerreotype on the other hand will switch from a positive to a negative image depending upon the angle at which it is viewed.
A negative image on glass that appears positive when placed over a black background. Similar in appearance to the daguerreotype, the ambrotype does not need to be held at a particular angle to view the image.
A photographic process which produces a wet collodion negative image on glass, which is backed with black paper or lacquer to give a positive image. The ambrotype was a popular portrait medium in the 1850s. See also Tintype.
The name for a glass collodion (gun cotton dissolved in alcohol and ether) positive photographic process patented in 1854 in the United States by James A. Cutting. Return to Photographs
A process patented in 1854 by James Ambrose Cutting, it was used as a less-expensive replacement for the daguerreotype. The process involves a collodion wet-plate negative which is backed with an opaque black lacquer, black paper or cloth to produce a positive image.
(from the Greek word for "imperishable") A collodion wet plate negative print on glass deliberately underexposed to make a faint image, backed with black paper or velvet, or sometimes painted black. Patented in the U.S. in 1854 by James Cutting, this technique was popular until the mid 1860s as a less costly substitute for the daguerreotype; each image is unique, small in size, mounted in a case but without the shiny mirror-like quality of the daguerreotype.
The ambrotype process (from Greek ambrotos, "immortal") is a photographic process invented in the mid-1850s by Frederick Scott Archer. The process creates a glass negative, which appears as a positive when placed against a black background.