C-type printing

A photogram is a photograph made without a lens or camera: objects are placed directly on top of a sheet of photographic paper which is then exposed to light. Where the objects obstruct the light, the paper remains unexposed (light in tone), while the rest darkens through exposure.

Silver salts Silver salts are light sensitive chemical compounds. When exposed to light – either in a camera (in the case of film and negatives) or in the dark room (photographic papers) – the silver salts react by darkening in proportion to the amount of light reflected from the subject. Silver bromide Print Silver bromides…

Also known as heliogravure, photogravure is arguably the finest photomechanical means of reproducing a photograph in large editions. Copper plates are acid-etched directly from an original silver print; the etched areas then hold differing amounts of ink in order to correspond to the tones of the original print. If prints remain untrimmed, the impression of…

Toning, or toned black and white: toning images allows an artist/printer to alter the colours of a photographic print (by replacing the silver in the silver salts with another metal). Toning can be used as an aesthetic decision by the artist, or it can also be used to improve the archival properties of a print….

P.F.T.s, or Print Film Transparencies, are positive colour reproductions from original negatives, produced as transparencies.

The autochrome is an early color photography process, patented the 17th December 1903 by Auguste and Louis Lumière. Before the commercialization, they diffused the autochrome technique to some favored photographers, like Sergey Prokudin-Gorsky. The commercialization started in 1907 and the technique was used between 1907 and about 1932. A lot of photos of the First World…