Light-sensitive silver halide photographic film material and radiographic intensifying screen-film combination

US6472137B1 · kind B1 · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Ann Verbeeck · Begijnendijk, BE
• Paul Callant · Edegem, BE
• Freddy Henderickx · Olen, BE

Key dates

• Filing date: Nov 13, 2000
• Grant date: Oct 29, 2002
• Expiry date: Nov 13, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/167
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A light-sensitive silver halide photographic film material has been provided, said film material comprising a transparent support and on both sides thereof at least one light-sensitive emulsion layer having spectrally and chemically sensitized tabular silver halide grains rich in silver bromide, further having silver iodide in an amount of less than 3 mole % based on silver, with two flat parallel {111} crystal faces, said grains accounting for a total projective surface of said parallel crystal faces in said emulsion of at least 50%, further having an average aspect ratio of at least 2:1, a grain thickness of from 0.05 up to 0.15 &mgr;m, a site-directing azacyanine compound satisfying the general formulae disclosed herein in an amount of not less than 1×10−4 mole per mole of silver halide coated and one or more J-aggregating spectrally sensitizing dye(s), wherein a molar ratio amount between said site directing compound and said J-aggregating spectrally sensitizing dye(s) is at least 1:6 for a grain coverage of said {111} tabular grains exceeding 50%.A radiographic screen/film combination has also been described comprising said light-sensitive silver halide photographi…