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Photographic printing is the process of producing a final image on paper for viewing, using chemically sensitized paper. The paper is exposed to a photographic negative , a positive transparency (or slide ) , or a digital image file projected using an enlarger or digital exposure unit such as a LightJet or Minilab printer.
Transparencies can be printed using a variety of technologies. In the 1960s and 70s the GAF OZALID "projecto-viewfoil" used a diazo process to make a clear sheet framed in cardboard and protected by a rice paper cover. [1] In the 1980's laser printers or copiers could make foil sheets using standard xerographic processes. Specialist ...
Photographic film is a strip or sheet of transparent film base coated on one side with a gelatin emulsion containing microscopically small light-sensitive silver halide crystals. The sizes and other characteristics of the crystals determine the sensitivity, contrast, and resolution of the film. [ 1 ]
The digital negative is the collective name for methods used by photographers to create negatives on transparency film for the contact printing of alternative photographic techniques. The negatives can also be enlarged using traditional gelatin silver processes , though this is usually reserved for negatives of 4x5" or larger due to quality ...
The distinction between promotional and fine art duratrans is purely in the subject matter of the artwork imaged onto the duratrans film. There is no other defining difference, except that possibly a fine art duratrans may be processed using higher resolutions, color depths, and/or other fabrication tolerances to effect a higher-precision result, for a more-demanding audience.
Therefore, the transparency is placed face up (toward the mirror and focusing lens), in contrast with a 35mm slide projector or film projector (which lack such a mirror) where the slide's image is non-reversed on the side opposite the focusing lens. A related invention for enlarging transparent images is the solar camera.
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A contact print is a photographic image produced from film; sometimes from a film negative, and sometimes from a film positive or paper negative. In a darkroom an exposed and developed piece of film or photographic paper is placed emulsion side down, in contact with a piece of photographic paper, light is briefly shone through the negative or ...