P.F.T.s, or Print Film Transparencies

Digital colour coupler Colour coupler prints, or chromogene prints, are very similar to standard C-type prints, but the silver salts ‘couple’ with coloured dyes, rather than being replaced by them. The end result is very similar to standard C-type prints. Colour coupler prints have the benefit of using the same extremely light-sensitive silver salts as…

Selenium gelatin photogram: see photogram and selenium toning. Selenium toned gelatin print: See silver gelatin print and selenium toning. Selenium toned photogram: see photogram and selenium toning. Selenium toning: A type of toning using the metal selenium to replace silver salts. Used both for the aesthetic benefits of a slightly warmer tone and greatly improved archival properties

Chloro-bromides share the features of all silver gelatin prints, giving deep rich blacks and crisp whites on a high gloss paper, as well as having good archival properties. Compared with silver bromides or silver chlorides, they have a warmer brownish-black tone.

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.

C-type printing involves printing colour paper enlargements from small, colour negatives. This is the most common type of colour printing found in the high street and mini-labs.

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…