Collodion method

The Collodion process is a fine printing process from the beginnings of photography , invented by Frederick Scott Archer in 1851. The exposure times were only two to three seconds. In this way, portraits could finally be faithfully reproduced. Before that, some of the people portrayed were strapped to equipment. However, the photographic plates had to be coated, exposed and developed while they are still moist. This restricted their use.