Silver halide
From Wikipedia, the free encyclopedia
Jump to: navigation, search ...
Silver Halide
From Nikonians Wiki - FAQs, Photo Glossary, Good Photo Locations, Help
Jump to: navigation, search ...
Silver halides
Techniques Glossary Silver halides
The light sensitive ingredient in photographic film and papers that is a combination of silver with bromine, fluorine, chlorine or iodine.
Silver Halide
Chemical compound of silver with a halogen. Silver bromide is the principal light sensitive constituent of modern photographic emulsions.
(see Emulsion) ...
Silver halide-The silver crystals that make up an image on a negative or print. When exposed to light, they create an image. Those that are not exposed are washed off, leaving either a negative (film) or positive (print) image.
silver halide
a silver salt such as silver chloride, silver bromide, or silver iodide suspended in a gelatin used in photographic film production.
silver iodide
pale yellow oderless powder that darkens on exposure to light.
Silver halides. Light-sensitive compounds of silver with the halogens (iodine, bromide, etc.). Normally white or creamy yellow in color. Used as the main sensitive constituent of photographic emulsions.
Silver halides - light sensitive crystals used in photographic emulsions, i.e. silver bromide, silver chloride and silver iodide. The change from white to black metallic silver when exposed to light.
"Silver halide photography, which is fundamental to photography, has advantages over digital in such areas as power of expression, long term storage capability, reasonable prices, ...
The early silver halide- gelatin emulsions (in which the image was revealed, of course, by development) were easily solarized by overexposure.
Microfilm with a cellulose acetate base (popular through the 1970s) is frequently subject to vinegar syndrome, redox blemishes, and tears, and even preservation standard silver halide film on a polyester base can be subject to silvering and ...
The greater amount of reflected light from the brighter object affects more silver halides in the emulsion. The portions of the negative where the most silver halides have been affected are referred to as HIGHLIGHTS.
developer Chemical solution containing a developing agent, as well as other constituents, which acts on exposed silver halide crystals in the photographics emuslion to produce a metallic silver image.
An image formed by the changes to the silver halide grains in photographic emulsion on exposure to light. The image is not visible until chemical development takes place. The invisible image left by the action of light on photographic film or paper.
In truth, color silver halide images are actually made out of three (or more) layers of black-and-white images that interact with color couplers to produce layers of color dye that when viewed together give the illusion of a full range of colors.
A chemist would say that it was "silver halide crystals suspended in gelatin on a base manufactured by extruding heated polyester material through a slot, thus orienting the molecules.
As a result, light passes through the film, exposes some silver halide in the film, then continues through the film to the pressure plate.
Natural protein, derived from animals, that's used to suspend silver halides evenly in an emulsion form on the paper and film's surface.
The 11-megapixel capture is impressive, and even superior to film in many ways, but I've not abandoned silver halide. I still love my Nikon F100 (Seacam housing), my RS with the 13mm lens, and my Nikonos with the 15mm.
In short, developers reduce the exposed silver halide to metallic silver. This forms a visible image from the latent image. The latent image is what is recorded on the film or paper when it was exposed. In a sense it is the possibility of an imge.
Using a mirror polished with silver halide, a daguerreotype uses either iodine, bromine or chlorine vapors to render an image on the silver plate.
The basic constituent is a developing agent which reduces the light-struck silver halide to metallic silver. Colour developers include chemicals which produce coloured dyes coincidentally with reduction of the silver halides.
Process of converting exposed silver halides (negative or positive film) into visible images
Dew Point:
The temperature to which the air must be cooled for water vapor to condense and form fog or clouds.
-Developer - chemical bath containing reducing agents, which converts exposed silver halides to black metallic silver, making the latent image visible.
-Development - process of converting exposed silver halides to a visible image.
Fixing: Chemical action following development to remove unexposed silver halides, to make the image stable and insensitive to further exposure.
GRAIN - Minute crystals of silver halides in the light-sensitive emulsion of film that react when exposed to light, turning black, are called "grains." (See Graininess of film.) ...
To increase the sensitivity of films, manufacturers use larger crystals, or grains, of silver halide-the light-sensitive part of a film emulsion.
Grain is a defect in film photography where the particles - normally clumps of silver halide crystals - of the film emulsion appear.
Grain is usually worse in faster films, and on smaller negative formats.
Read more ...
Substrate coated with emulsion containing light sensitive silver halide grains.
Photo CD
Compact Disk type storage technology developed by Kodak in the early 1990s.
Emulsion: A light sensitive coating on photographic film and paper. An emulsion is made up of silver halides and gelatin.
Each of these layers is completely covered in film grains made from silver halide crystals in a random arrangement. Resolution on film is limited to the size of a grain much as it is to the size of a pixel with digital.
atmosphere, and drama; to illuminate the story; to separate planes; to suggest depth; to direct attention; to reveal character; to convey time of day; to enrich and, occasionally, bedazzle. Minimum aim: to stimulate microchips and silver halides.
Bleaching: Chemical used in processing to convert black silver image into colorless compound such as silver halide.
Bounced flash: Flash illumination reflected from a ceiling or wall being diffused.
Lower levels of gain will darken the image, and soften the contrast. Effectively, gain adjustment affects the sensitivity to light of the CCD or CMOS sensor. In a digital camera, this concept is analogous to the ISO or ASA ratings of silver halide ...
professional work at all, but neither is he afraid of the computer. Both photographers are adamant about the fact that they're simply choosing the best tool for the job, and at this moment the best tool for capturing their subjects is silver halide.
 See also: Silver, Photograph, Image, Light, Film
|
