WordNet
n. a light-sensitive coating on paper or film; consists of fine grains of silver bromide suspended in a gelatin [syn: emulsion]
Wikipedia
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.
Photographic emulsion is not a true emulsion, but a suspension of solid particles (silver halide) in a fluid (gelatin in solution). However, the word emulsion is customarily used in a photographic context. Gelatin or gum arabic layers sensitized with dichromate used in the dichromated colloid processes carbon and gum bichromate are sometimes called emulsions. Some processes do not have emulsions, such as platinum, cyanotype, salted paper, or kallitype.
Usage examples of "photographic emulsion".
But we have a full-scale neutrino detector: a ton of dense photographic emulsion, the stuff you use on a camera film.
He was attending a night seminar at the great telescope on Mount Wilson east of Cal Tech when he chanced to see an amazing photographic plate which showed one of the most distant galaxies, invisible to the unaided eye and to most telescopes, but absolutely perfect when caught in a giant telescope and held in focus on the photographic emulsion for eight hours.
For the others - she murmured technical things, such as the fragility of good equipment and perishability of photographic emulsion.
With proper knowledge, however, any good chemist could make a photographic emulsion which would record their images.
Purists had claimed for centuries that no photographic emulsion, holographic trace-record, or computerized visual reproduction ever made had quite the same range and power as the human eye.