Definitions for "Ambrotype"
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.