EP 0953867 A1 19991103 - Method to spectrally sensitize tabular silver halide grains
Title (en)
Method to spectrally sensitize tabular silver halide grains
Title (de)
Verfahren zur spektralen Sensibilisierung von tafelförmigen Silberhalogenidkörnern
Title (fr)
Procédé à sensibiliser spectralement des grains à l'halogénure d'argent tabulaires
Publication
Application
Priority
EP 98201401 A 19980429
Abstract (en)
A method has been disclosed for preparing a tabular silver halide emulsion wherein tabular silver halide grains having an average aspect ratio of at least 2:1, an average crystal diameter from 0.3 mu m to 3.0 mu m and an average thickness of less than 0.50 mu m account for at least 50 % of the total projective surface area of said grains, said method comprising the steps of precipitating, spectrally sensitizing and chemically ripening said grains, characterized by spectrally sensitizing by adding to the emulsion grains before chemically ripening at least one J-band aggregating spectrally sensitizing dye and at least one non-J-band aggregating dye. A light-sensitive silver halide emulsion having at least one J-band aggregating dye and at least one non-J-band aggregating dye comprising said tabular grains has also been disclosed as well as a light-sensitive silver halide photographic X-ray material comprising a support, at least one hydrophilic colloid layer on at least one side of said support and one or more photosensitive layer(s) comprising the said silver halide photographic emulsion and a radiographic screen-film combination comprising at least one X-ray intensifying screen in operative association with the said material.
IPC 1-7
IPC 8 full level
G03C 1/00 (2006.01); G03C 1/005 (2006.01); G03C 1/035 (2006.01); G03C 1/06 (2006.01); G03C 1/12 (2006.01); G03C 1/29 (2006.01); G03C 5/17 (2006.01); G21K 4/00 (2006.01); G03C 1/09 (2006.01); G03C 1/18 (2006.01); G03C 1/40 (2006.01)
CPC (source: EP)
G03C 1/0051 (2013.01); G03C 1/12 (2013.01); G03C 1/29 (2013.01); G03C 5/17 (2013.01); G03C 1/09 (2013.01); G03C 1/18 (2013.01); G03C 1/22 (2013.01); G03C 1/40 (2013.01); G03C 2001/091 (2013.01); G03C 2001/096 (2013.01); G03C 2001/097 (2013.01)
Citation (search report)
- [Y] EP 0678772 A1 19951025 - AGFA GEVAERT NV [BE]
- [Y] EP 0712034 A1 19960515 - AGFA GEVAERT NV [BE]
- [Y] EP 0556413 A1 19930825 - KONISHIROKU PHOTO IND [JP]
- [Y] US 5141846 A 19920825 - FICKIE KENNETH E [US], et al
- [Y] PATENT ABSTRACTS OF JAPAN vol. 014, no. 430 (P - 1106) 14 September 1990 (1990-09-14)
Designated contracting state (EPC)
BE DE FR GB
DOCDB simple family (publication)
EP 0953867 A1 19991103; EP 0953867 B1 20040804; DE 69825419 D1 20040909; DE 69825419 T2 20050630; JP 2000066323 A 20000303
DOCDB simple family (application)
EP 98201401 A 19980429; DE 69825419 T 19980429; JP 11317699 A 19990421