The wet collodion process-a scientific approach

摘要

The wet collodion process was the first successful photographic negative process. The tone and detail reproduction of both negatives and prints are remarkably good. There are a lot of collodion plates still in existence, but the detailed knowledge how the excellent image quality was achieved has been lost. The Institute of Applied Photophsics in Dreshen harbors the photographic work of the German pioneer Hermann Krone (1827-1916). He became prominent after starting to use the wet collodion method for landscape photography in 1853. It is extremely difficult to make sati-fac-tory reproductions from those historic negatives on contemporary photographic materials or to digitize the old pictures.