wet-collodion process, also called collodion process, early photographic technique invented by Englishman Frederick Scott Archer in 1851. The process involved adding a soluble iodide to a solution of collodion (cellulose nitrate) and coating a glass plate with the mixture.

Where was the collodion invented?

Richard Hill Norris, a doctor of medicine and professor of physiology at Queen's College, Birmingham (a predecessor college of Birmingham University), is generally credited with the first development of dry collodion plate when in 1856 he took out a new patent for a dry plate used in photography in which the emulsion ...

What process in 1878 replaced the collodion process?

Gelatin dry plate

After various improvements, the process went into general manufacture in 1878, rapidly replacing the wet collodion process. The plates were bought ready-prepared and could be stored for several weeks or months before exposure and development.