Set of chemicals for the wet-plate proces, 1854. Three glas bottles containing chemicals for producing photographic images using the wet- plate method. A glas plate was coated with silver salts and collodion. It was then placed in the camera and exposed while still wet. This proces was an improvement on the daguerreotype as it produced negative images of fine detail in a much shorter exposure time than previously.
© National Media Museum / Science & Society Picture Library