Chapter 15

Black-and-White Photographic Development

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"Self-Portrait" by Robert Lussen, Advertising Photography student, Rochester Institute of Technology.

 

Negative Development

When a silver halide emulsion on film or paper has been exposed to a light, a latent image is formed in the emulsion and in most circumstances this image would not be visible because of the small amount of silver produced. The energy required to produce such a latent image is relatively small, permitting exposure times of 1/20,000 second or shorter under daylight illumination. The development process amplifies this image by a factor of up to 109 or a billion times producing ...

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