(19)
(11) EP 0 774 685 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
02.07.1997 Bulletin 1997/27

(43) Date of publication A2:
21.05.1997 Bulletin 1997/21

(21) Application number: 96203141.5

(22) Date of filing: 11.11.1996
(51) International Patent Classification (IPC)6: G03C 1/34, G03C 7/30
(84) Designated Contracting States:
DE FR GB

(30) Priority: 14.11.1995 GB 9523218

(71) Applicants:
  • KODAK LIMITED
    Harrow, Middlesex HA1 4TY (GB)

    GB 
  • EASTMAN KODAK COMPANY
    Rochester, New York 14650-2201 (US)

    DE FR 

(72) Inventors:
  • Codling, Adrian James Bower
    Harrow, Middlesex, HA1 4TY (GB)
  • Daunter, Stephen Timothy
    Harrow, Middlesex, HA1 4TY (GB)

(74) Representative: Nunney, Ronald Frederick Adolphe et al
Kodak Limited Patent Department Headstone Drive
Harrow Middlesex HA1 4TY
Harrow Middlesex HA1 4TY (GB)

   


(54) Photographic materials for use in redox amplification and process


(57) A photographic silver halide colour material eg paper, suitable for use in redox amplification comprises a support bearing one or more emulsion layers, at least one of said layers containing a sulphur-containing antifogging agent for example mercaptotetrazole, the amount of said agent being effective to reduce fog but not more than 0.5mg/m2, preferably not more than 0.3mg/m2. Preferably the antifogging agent is incorporated into a blue or green sensitive layer. Using the present invention a redox amplification process can be carried out at temperatures up tp 37oC with acceptable fog control.





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