Definitions for "Characteristic curve"
A curve showing the relationship between exposure and resulting density in a photographic image, usually plotted as the density (D) against the logarithm of the exposure (log E) in candlemeter-seconds. It is also called the H and D curve, the sensitometric curve, and the D log E curve.
(electronics) graph showing how a particular characteristic of a device varies with other parameters
a graphic representation of the response of a film to both exposure and development
Keywords:  printing, see
See "printing characteristics".