(19)
(11) EP 0 309 119 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
07.06.1989 Bulletin 1989/23

(43) Date of publication A2:
29.03.1989 Bulletin 1989/13

(21) Application number: 88308279.4

(22) Date of filing: 07.09.1988
(51) International Patent Classification (IPC)4: G03C 1/02
(84) Designated Contracting States:
DE GB IT NL

(30) Priority: 19.09.1987 JP 235569/87

(71) Applicant: KONICA CORPORATION
Tokyo 160 (JP)

(72) Inventors:
  • Mochizuki, Yoshiharu
    Hino-shi Tokyo (JP)
  • Ishikawa, Sadayasu
    Hino-shi Tokyo (JP)
  • Yagi, Toshihiko
    Hino-shi Tokyo (JP)
  • Inoue, Masamitsu
    Hino-shi Tokyo (JP)

(74) Representative: Wood, Anthony Charles et al
Urquhart-Dykes & Lord 91 Wimpole Street
London W1M 8AH
London W1M 8AH (GB)


(56) References cited: : 
   
       


    (54) High sensitivity, high graininess light-sensitive silver halide photographic material


    (57) A light-sensitive silver halide photographic material having at least one layer of emulsion layer containing an emulsion which is a silver halide emulsion containing silver iodobromide grains having 3 or more phases of silver bromide or silver iodobromide with different compositions, the emulsion having, in the diffraction signal according to powdery X-ray diffraction, 3 or more diffraction maximums based on the diffraction peak corresponding to the maximum iodine content phase, the diffraction peak corresponding to the minimum iodine content phase and one or plural number of diffraction peaks corresponding to the intermediate iodine content phase comprising intermediate compositions between the maximum iodine content phase and the minimum iodine content phase, and two or more diffraction minimums therebetween.
    According to the present invention, there can be obtained a light-sensitive silver halide photographic material with high sensitivity and high graininess.







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