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Encyclopedia > Photo processing

A piece of photographic film that has been exposed to light in a controlled manner must be developed before it can be used. Development does three things: it transforms the latent image into a visible image that can be seen, it makes the visible image permanent and resistant to deterioration with time, and it renders the film insensitive to light. Photographic paper is developed in a similar manner. Undeveloped Arista black and white film, ISO 125. ... In photography a latent image is formed when light (or in radiography, X-rays) acts on a photographic emulsion. ... Until the advent of digital photographic processes, the sole meaning of Photographic Paper was paper coated with light-sensitive chemicals. ...


(This article does not apply to Polaroid film, which uses a self-contained developing process.) Polaroid (a trademark of the Polaroid Corporation) is the name of a type of synthetic plastic sheet which is used to polarise light. ... Instant film is a photographic film that is designed to be used in an instant camera. ...


The steps to black and white negative film developing are:

  • The film is removed from the camera and wound onto a reel in complete darkness (usually inside a darkroom or a lightproof bag with arm holes). The reel holds the film in a spiral shape, with space between each successive loop so the chemicals may flow freely across the film's surfaces. The reel is placed in a specially designed light-proof tank.
  • The film is then treated with a series of chemicals:
    • The first of these is developer, which makes the latent image visible.
    • The second chemical is a stop bath, which stops the action of developer. (Sometimes plain water is used for this step.) It also helps to clean the developer residue off of the film to prevent contaminating the fixer.
    • The third chemical is called fixer. It makes the image permanent and light-resistant.
    • Fixer itself is slightly corrosive, so the film must be washed. Sometimes, it is then placed in a bath of a hypo clearing agent (and sometimes another material, such as selenium). It is then treated with a solution to prevent the appearance of hard-water stains, dried, and cut into strips of a convenient length.

In color negative processes the silver halide crystals present in the emulsion need to be removed. This is called bleaching. Bleaching may be done as an additional step or the bleaching agent, usually potassium ferricyanide, may be formulated in with the fixer. Bleaching may be skipped intentionally to create an optical effect on the film called Bleach bypass. A camera is a device used to take pictures (usually photographs), either singly or in sequence, with or without sound recording, such as with video cameras. ... A darkroom is a given space, usually a separate area in a building or a vehicle, for photographers to use light-sensitive materials to develop photographs. ... In film developing, photographic developer (or just developer) is a chemical that makes the image on the film or print visible. ... Stop bath is the second of three chemical baths usually used in processing traditional black-and-white photographic films, plates, and paper. ... Photographic fixer is a chemical used in the final step in the photographic processing of film or paper. ... General Name, Symbol, Number selenium, Se, 34 Chemical series nonmetals Group, Period, Block 16, 4, p Appearance gray, metallic luster Atomic mass 78. ... A silver halide is one of the compounds formed between silver and one of the halogens, notably silver bromide (AgBr), silver chloride (AgCl) and silver iodide (AgI). ... Commercial chlorine bleach In chemistry, to bleach something generally means to whiten it or oxidize it. ... Potassium ferricyanide (K3Fe(CN)6), molecular weight:329. ... Bleach bypass is a optical effect used in such films as Seven, Kansas City and The Crow and most notably Three Kings. ...


  Results from FactBites:
 
photo processing - Cyber Tech Help Support Forums (618 words)
Does anyone know of photo software where i can convert pictures sent by relatives through internet to form that i can save it on floppy and take to one of those photo machines found in walmart, insert floppy and print them.I don't have printer which can print good quality photos.
I tried saving photos in jpeg form using image processing software found on web on floppy and tried to print using photo machines mentioned above but photo is not recognized by it.
If the photo's are already in jpeg format and are sent as attachments, if you are using outlook Express all you need to is go to File > Save Attachments and you can save the file directly to a floppy if you wish (depending on file size as dammit pointed out).
  More results at FactBites »

 
 

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