Name of the process: 
Ambrotype without the black backing - unknown woman
Same ambrotype with the backing

One side of a very clean glass plate is covered with a thin layer of collodion, then dipped in a silver nitrate solution. The plate is exposed to while still wet. (Also known as a "wet plate" process) The plate is then developed and fixed. The resulting negative, when viewed against a black background, appears to be a positive image. The back is usually coated with black varnish or mounted in the case against a black cloth, making the image appear quite dark.

The Ambrotype is much less expensive to produce than the Daguerreotype.

Date Range: 
Negative Used to Create Image: 
Materials Used: 
Glass, collodian, silver nitrate
Inherent Vice: 
Dark images
No negative