Radiographic film material exhibiting increased covering power and “colder” blue-black image tone

US6348293B1 · kind B1 · utility

Assignee

• Agfa-Gevaert NV · BE

Inventors

• Ann Verbeeck · Begijnendijk, BE
• Johan Loccufier · Zwijnaarde, BE
• Govert De Baecke · Kalken, BE
• Freddy Henderickx · Olen, BE
• Heinrich Odenwalder · Leverkusen, DE

Key dates

• Filing date: Nov 20, 2000
• Grant date: Feb 19, 2002
• Expiry date: Nov 20, 2020

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S430/168
• WIPO field: Optics
• WIPO sector: Instruments

Abstract

A radiographic film material is described including a transparent film support having first and second major surfaces coated with a subbing layer, optionally overcoated with an antihalation undercoat. Coated adjacent on each side of the film support is a light-sensitive silver halide emulsion overcoated with a protective antistress layer. The emulsion layer has chemically and spectrally sensitized {111} tabular hexagonal grains or crystals, having silver iodide in an amount of at most 3 mole %, based on silver, covering at least 50% of the total projective surface of all grains, having an average grain thickness of less than 0.30 &mgr;m. The antistress layer, or the optional antihalation undercoat or both includes a N-amino mercapto-triazole compound containing one or more alkali soluble group(s). A radiographic screen/film combination is also described including the film material.