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 classic literature ?
There it was, black under the darkening sky: no motion, no sound near.
She stood with her arms folded in her cloak, looking down at the darkening river.
She left the bridge on the side by which I had first seen her approach it, and walked slowly away along the darkening track of the highroad.
The shadow of the book would then throw into obscurity a half of the room, darkening a number of faces and figures; for besides the reader, eight other men were present.
A few dim sails drifted along the darkening, fir-clad harbor shores.
He stood, listened, and gazed sometimes down at the wet mossy ground, sometimes at Laska listening all alert, sometimes at the sea of bare tree tops that stretched on the slope below him, sometimes at the darkening sky, covered with white streaks of cloud.
This discouraging information a little dashed the child, who could scarcely repress a tear as she glanced along the darkening road.
TEHRAN (FNA)- The findings of a new research suggested that carbon from passing comets could be the planet's mystery darkening agent.
The Moon will travel in front of the Sun, casting a shadow over the Earth and darkening the heavens on March 20.
14, roof restoration and reconstruction with abruch 5th floor, seitzstraE-e (bt a, a1, a2) - darkening system.
The darkening that occurs after potatoes are processed and cooked is an inherent, but also undesirable trait.
Overall, they studied 10 males of known age and 26 whose ages were estimated based on the extent of blotch darkening when first observed.