Title
The influence of crystal thickness on the image tone The influence of crystal thickness on the image tone
Author
Faculty/Department
Faculty of Sciences. Physics
Publication type
article
Publication
Springfield, Va ,
Subject
Physics
Engineering sciences. Technology
Source (journal)
The journal of imaging science and technology. - Springfield, Va
Volume/pages
47(2003) :2 , p. 133-138
ISSN
1062-3701
8750-9237
ISI
000182879400007
Carrier
E
Target language
English (eng)
Affiliation
University of Antwerp
Abstract
It is known that the neutral image tone of a developed photographic film becomes brownish when the thickness of the original silver halide tabular crystals is reduced. We investigate by electron microscopy to what extent the silver filament structure has changed and how it induces the shift in image tone. Therefore, two samples of AgBr {111} tabular crystals with average thicknesses of 160 nm and 90 nm respectively, are compared. It is shown that the dimensions and defect structure of the filaments are comparable, but that the 90 nm crystals result in a more widely spaced structure, which explains the shift in image tone on a qualitative level. The influence of the addition of an image toner, i.e., phenylmercaptotetrazole, on the filament structure is also investigated. An even more open filament structure of longer, but smaller filaments was observed.
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