Zhenhuan Wen


Quantum sensitivity is an important emulsion property for photographic image formation and is usually calculated from a fraction of grains developable vs. log exposure (F-log E) curve. In this thesis, a new method, the electrolytic grain-size analyzer (EGSA) technique has been developed that will allow one to obtain F-log E curves for each grain size class in polydisperse emulsions. The correctness of the F-log E curve obtained by this new method has been examined by comparing the F-log E curve with that calculated from the normalized D-log E curve in the case of monodisperse emulsions. The problems in EGSA measurement, such as "noise" and emulsion solubility, which affect the accuracy of F-log E curves obtained by such a method, have been solved and are discussed in detail. The technique has been applied to the case of an emulsion with a bimodal grain size distribution.

Library of Congress Subject Headings

Photographic emulsions; Photographic chemistry; Emulsions; Electrochemical analysis

Publication Date


Document Type


Department, Program, or Center

Chester F. Carlson Center for Imaging Science (COS)


Hailstone, Richard

Advisor/Committee Member

Hornak, Joseph

Advisor/Committee Member

DiFrancesco, Gary


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: TR395 .W46 1998


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