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Now
available from your digital file Silver Halide Prints.
This is the same print you would receive from your negative..
The primary element for light
capture in photography is the silver halide crystal. When
exposed to light, this crystal forms a small, stable
"latent image" that is highly amplified during
photographic development. In black-and-white photography the
reduced metallic silver forms the image. In color photography,
the oxidized developer is used to create a colored image in
register with the developed silver.
Sensitivity to light, or
photographic speed, is one of the most important attributes of
the emulsion. Intrinsic sensitivity is typically enhanced during
manufacture by a heat treatment in the presence of tiny amounts
of sulfur and gold compounds (chemical sensitization). Organic
dyes, usually cyanine dyes, are then applied to the crystal
surface to extend the basic UV and blue sensitivity to other
colors in the visible spectrum (spectral sensitization).
Different layers in a color film contain emulsions that have
been dyed to respond selectively to blue, green, and red light,
thus making color photography possible.
The silver halide
emulsion literally "sets the scene" for the subsequent
complex chemical processes that lead to the formation of a
colorful image. The perennial challenge to Kodak’s emulsion
scientists is to increase film speed while maintaining image
quality and keeping performance.
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