Chromogenic refers to color photographic processes in which a traditional silver image is first formed, and then later replaced with a colored dye image. Lens and mounting of a large format camera Photography is the technique of recording and generating permanent images, by the capturing and preservation of physical stimulus-patterns on a layer of photosensitive material. ... Look up dye in Wiktionary, the free dictionary. ...

Chromogenic film or paper contains one or many layers of silver halide emulsion, along with dye couplers which are capable of forming visible dyes in combination with processing chemistry. In processing, the silver image of each layer is first developed. In concert with the dye couplers in each layer, the process subsequently forms dyes only in those areas where silver is present. This article or section does not cite its references or sources. ... Until the advent of digital photographic processes, the sole meaning of photographic paper was paper coated with light-sensitive chemicals. ... A silver halide is one of the compounds formed between silver and one of the halogens, usually silver bromide (AgBr), silver chloride (AgCl) and silver iodide (AgI). ... A dye can generally be described as a coloured substance that has an affinity to the substrate to which it is being applied. ...

In full-color chromogenic materials, multiple layers of emulsion are sensitized to different wavelengths of light. Three layers are usually present, generally sensitive to red, green, and blue colored light. Cyan-colored dye is formed on the red-sensitive layer, magenta-colored dye is formed on the green-sensitive layer, and yellow-colored dye is formed on the blue-sensitive layer, following generally the CMY color model. For other uses, see Light (disambiguation). ... Cyan, magenta, yellow, and key (black) CMYK (or sometimes YMCK) is a subtractive color model used in color printing. ...

Some chromogenic black-and-white negative films also exist, mainly to exploit the wide availability of C-41 processing. These films have softer grain and less contrast than traditional silver halide films. In these films, a single emulsion layer has panchromatic sensitivity. The dye image is typically slightly blue because of the choice of dye couplers, and this tends to produce a dark sepia tone when printed on full-color chromogenic paper. Black-and-white or black and white) can refer to a general term used in photography, film, and other media (see black-and-white). ... C-41 is the name given to the process for developing a specific type of color print film used in photography and often to the type of film itself. ... A silver halide is one of the compounds formed between silver and one of the halogens, usually silver bromide (AgBr), silver chloride (AgCl) and silver iodide (AgI). ... Panchromatic is a term describing a type of photographic film that is sensitive to all wavelengths of visible light. ...

Each microscopic point of chromogenic dye formation is called a dye cloud. After the formation of dyes is complete, the silver image is removed in processing by a specialty photographic fixer called bleach fix or blix. A processing variation called skip bleach, most popular in motion picture negative processing, allows the silver image to be left partially or completely intact, yielding a type of contrast enhancement. Photographic fixer is a chemical used in the final step in the photographic processing of film or paper. ...

The most common chromogenic processes are C-41 for color and black-and-white negative film, RA-4 for color negative paper (see Type C print), and E-6 for slide film. C-41 is the name given to the process for developing a specific type of color print film used in photography and often to the type of film itself. ... Black-and-white or black and white) can refer to a general term used in photography, film, and other media (see black-and-white). ... In photography, a negative is a rectangle of material (nowadays usually photographic film) coated with chemicals that, upon photographic exposure, cause the material to record the colors or monochromatic shades of the scene in inverse, negative form. ... RA-4 is a color print process used to develop color photographic paper. ... A Type C print refers to a photographic print made on negative-type photographic paper. ... The E-6 process (sometimes abbreviated to just E-6) is a process for developing color reversal (transparency) photographic film. ...

A great deal of research effort has been placed by manufacturers, most notably Fujifilm, Ilford, and Kodak, into controlling the color and tonal characteristics of their chromogenic film and paper. The sensitization of the silver halide emulsions, the composition and mixture of the dye couplers, and the chemical interactions of layers upon one another during processing (called interlayer effects), are the subjects of numerous patents. Fujifilm is apparently unique in its use of a fourth (cyan-sensitive) color layer in certain of its negative films. Fujifilm Holdings Corporation or Fujifilm ) is a Japanese company known for its photographic film and cameras. ... For other uses, see Ilford (disambiguation). ... Eastman Kodak Company (NYSE: EK) is a large multinational public company producing photographic equipment. ... A silver halide is one of the compounds formed between silver and one of the halogens, usually silver bromide (AgBr), silver chloride (AgCl) and silver iodide (AgI). ... Fujifilm Holdings Corporation or Fujifilm ) is a Japanese company known for its photographic film and cameras. ...

Like the traditional silver halide process, the main hazardous waste product of chromogenic processing consists of silver compounds dissolved in the photographic fixer. A silver halide is one of the compounds formed between silver and one of the halogens, usually silver bromide (AgBr), silver chloride (AgCl) and silver iodide (AgI). ... Photographic fixer is a chemical used in the final step in the photographic processing of film or paper. ...