An investigation was conducted regarding the effects of varying supplementary exposure on High eSpeed Infrared Film. In addition, CPA was evaluated in comparison to Hypersensitization and Latensification. The results were that CPA is superadditive with respect to both density and exposure, the maximum effect being noted in the toe of the characteristic curve. Furthermore, Hypersensitization and Latensification , with dark intervals up to five seconds, displayed efficiency that was not significantly different from CPA. It was also determined that the spectral distribution of the imaging source does not affect the efficiency of CPA. Corroboration of C&C Research's speed increase claims was achieved.

Library of Congress Subject Headings

Photography--Films; Photographic sensitometry

Publication Date


Document Type


Department, Program, or Center

School of Photographic Arts and Sciences (CIAS)


Francis, Ronald

Advisor/Committee Member

Carroll, Burt

Advisor/Committee Member

Shoemaker, William


Note: imported from RIT’s Digital Media Library running on DSpace to RIT Scholar Works. Physical copy available through RIT's The Wallace Library at: TR280.F42 1980


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