Open AccessAnomalous D-Log E curve with high contrast developer Kodak D8 on ultra fine grain emulsion BB640
Author(s) -
Manuel Ulibarrena,
María José Rabazo Méndez,
S. Blaya,
A. Fimia
Publication year - 2001
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.9.000645
Subject(s) - emulsion , silver halide , materials science , optics , photographic emulsion , contrast (vision) , distortion (music) , grain size , analytical chemistry (journal) , mineralogy , physics , composite material , optoelectronics , chemistry , biochemistry , chromatography , amplifier , cmos
D-Log E curves, also known as H-D curves, are used since the XIX century as a tool for describing the characteristics of silver halide emulsions. This curve has a very standard shape, with a linear region, a toe, a shoulder and a solarization region. In this work we present a distortion of the usual curve due to the action of a high contrast developer, Kodak D8, on an ultra fine grain emulsion, BB640\cite{ov04}. The solarization effect is replaced by a linear zone where developed densities increase with increasing exposures, until all silver halide present in the emulsion is reduced by developer D8 to metallic silver. Densities higher than 11 have been obtained.