Daniel Davis Jr. (photographer)
Encyclopedia
Daniel Davis Jr. was an American
United States
The United States of America is a federal constitutional republic comprising fifty states and a federal district...

 photographer, daguerreotypist
Daguerreotype
The daguerreotype was the first commercially successful photographic process. The image is a direct positive made in the camera on a silvered copper plate....

 and ambrotypist
Ambrotype
right|thumb|Many ambrotypes were made by unknown photographers, such as this American example of a small girl holding a flower, circa 1860. Because of their fragility ambrotypes were held in folding cases much like those used for [[daguerreotype]]s...

.

In 1842 Daniel Davis Jr. patented a method for colouring daguerreotypes through electroplating
Electroplating
Electroplating is a plating process in which metal ions in a solution are moved by an electric field to coat an electrode. The process uses electrical current to reduce cations of a desired material from a solution and coat a conductive object with a thin layer of the material, such as a metal...

, and his work was refined by Warren Thompson the following year.
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