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Photographic emulsion is a light-sensitive colloid used in film-based photography. Most commonly, in silver-gelatin photography , it consists of silver halide crystals dispersed in gelatin . The emulsion is usually coated onto a substrate of glass , films (of cellulose nitrate , cellulose acetate or polyester ), paper, or fabric.
Panchromatic negative film is used in the camera as the rear component of a bipack in which the front film is a positive yellow dye image of the background scene. This yellow dye image is exposed on the negative by the blue light from the backing areas, but the yellow light from the foreground passes through it and records an image of the ...
The film is loaded and projected onto a piece of glass that has been painted first black, then white. The matte artist decides where the matte line will be and traces it on the glass, then paints in the background or scenery to be added. Once the painting is finished the matte artist scrapes away the paint on the live action portions of the ...
Instant films with different view and expose sides had, as seen from the view side, from the front towards the back of the film, in layers: A backing layer, a clear polyester layer, a mordant to receive the image in the film, a titanium white light reflecting layer, a carbon black opaque layer, a releaser for the cyan dye, an emulsion sensitive ...
Celluloids are a class of materials produced by mixing nitrocellulose and camphor, often with added dyes and other agents.Once much more common for its use as photographic film before the advent of safer methods, celluloid's common present-day uses are for manufacturing table tennis balls, musical instruments, combs, office equipment, fountain pen bodies, and guitar picks.
A notch code is a set of notches or recesses cut into the edge of a piece of sheet film to provide a tactile way to identify the film brand, type, and processing chemistry (e.g. black and white, color negative, or color reversal) in the dark. It enables photographers to identify the emulsion side of the film when loading sheet film holders, and ...
The front film is orthochromatic, to record the blue-green portion of the picture. On the surface of its emulsion is a red-dye layer equivalent to a Wratten 23A filter. The rear film is panchromatic, and being photographed through the red coating of the front film, records only the red-orange components of the picture. No filtering is necessary ...
[1] An anti-halation backing is a layer found in many photographic films—and almost all film intended for motion picture cameras—usually a coating on the back of the film base, though it is sometimes incorporated between the light-sensitive emulsion and the base. Its purpose is to absorb light that passes through the emulsion, thus ...