Darkening


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Darkening

 

(or density), the deposition of metallic silver in a photosensitive emulsion in black-and-white photography, or the deposition of dyes in monopacks in color photography, that takes place during development. In photographic materials that do not require development, “direct” darkening occurs immediately after exposure. Darkening that appears upon development of unexposed photosensitive emulsions is called fogging. The quantitative measure of darkening is the optical density of the developed layer or the surface concentration of silver or other light-absorbing substance that produces darkening.

References in periodicals archive ?
Complementing the Dometic FP300 windscreen blind, the new system provides perfect privacy all around with its guide panel for improved privacy and darkening effect.
Although one of the more costly options, going through hair removal treatments is the most common piece of advice given to help people avoid shaving and plucking which cause darkening. On the upside, more dermatologist clinics have been offering laser hair removal services in way cheaper prices in the recent years.
The President has already dismissed all speculations about his darkening face, saying he got them for visiting military camps across the country.
Occasions of darkening in the seventeenth and eighteenth centuries were probably rare and thus unexpected as in a darkened scene in James Cross's pantomime, Harlequin and Quixote, at Covent Garden in 1797, which "created a momentary alarm among the audience" (Whitehall Evening Post 26 Dec.
The scientists looked into the hypothesis that soot from forest fires in China, Siberia and North America could be driving the increased darkening of the ice sheet.
The strongest section of Darkening Mirrors is its three central chapters on the Federal Theatre Project and Dunham (whose L'Ag'Ya, the dance Batiste focuses on, was staged by the FTP).
Titan's limb darkening is especially prominent during transits, when the satellite crosses the face of Saturn.
We see that the sailboat reflects much less light, revealing the overall darkening of the painting.
Other features include a touch pad for managing an XGA connection, brightening or darkening images, switching between a positive and negative image, mirroring or freezing images, controlling the iris and creating split screen images.
Manuel Zapata Olivella and the "darkening" of Latin American literature.
No Popery!: Anti-Papal Prejudice is a fascinating historical survey with informative chapters devoted to "Bad Popes"; "The Campaign Against Pius IX"; "Some Other Modern Slanders and Slanderers"; "The Pope Who was a Freemason"; Why Pope Clement XII Condemned Freemasonry"; "On Some Medieval Fables"; "Hildebrand and Matilda of Tuscany"; "Papal Forgeries"; "The Forgeries of Cardinal Vaughan"; "The Popes and the Bible"; "The Extermination of Heretics"; "Groveling to the Pope"; "Papal Rapacity and the Ecclesia Anglicana"; "The Popes in Protestant Tradition"; "Darkening the Shadows"; and "What Prejudice Ignores".