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DAY 252 | HISTORY OF PHOTOGRAPHY |
Collodion Process
MAKE ’EM WHILE IT’S WET
Collodion is a light-sensitive concoction made up of guncotton (cotton specially treated with nitric and sulfuric acids) mixed with alcohol and ether that was originally used to treat the wounds of burn victims. When collodion liquid dries as a result of evaporation, it forms a tough, transparent flexible film. In photographic use, the collodion-on-glass negative process was introduced in 1851 by Frederick Scott Archer and was the process of choice for over 30 years. It came to be known informally as the “wet plate process” because the exposure had to be made and ...
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