(19)
(11) EP 0 397 167 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
23.01.1991 Bulletin 1991/04

(43) Date of publication A2:
14.11.1990 Bulletin 1990/46

(21) Application number: 90108809.6

(22) Date of filing: 10.05.1990
(51) International Patent Classification (IPC)5G03C 5/305, G03C 1/10
(84) Designated Contracting States:
DE GB

(30) Priority: 10.05.1989 JP 116832/89
10.05.1989 JP 116833/89

(71) Applicant: FUJI PHOTO FILM CO., LTD.
Kanagawa-ken (JP)

(72) Inventors:
  • Takagi, Yoshihiro
    Minami Ashigara-shi, Kanagawa (JP)
  • Hirano, Mitsunori
    Minami Ashigara-shi, Kanagawa (JP)
  • Sasaoka, Senzo
    Minami Ashigara-shi, Kanagawa (JP)

(74) Representative: Patentanwälte Dr. Solf & Zapf 
Candidplatz 15
81543 München
81543 München (DE)


(56) References cited: : 
   
       


    (54) Method of forming images


    (57) A method of forming a black-and-white image of very high contrast having a gamma value of 8 or above is disclosed, using a negative imagewise exposed photo­sensitive material comprising a support having thereon at least one hydrophilic colloid layer, at least one layer which is a silver halide emulsion layer, at least one of said hydrophilic colloid layer containing a hydrazine derivative represented by formula (I), comprising processing the photosensitive material with a developer having a pH of 11.2 or lower, said developer being substantially free from benzotriazoles to thereby provide a wide exposure latitude and steady image formability:

    wherein R₁ represents an aliphatic group or an aromatic group; R₂ represents a hydrogen atom, an alkyl group, an aryl group, an alkoxy group, an aryloxy group, an amino group, a carbamoyl group or an oxycarbonyl group; G₁ represents a carbonyl group, a sulfonyl group, a sulfoxy group,

    or an iminomethylene group; and each of A₁ and A₂ represents a hydrogen atom, or one of A₁ and A₂ is a hydrogen atom and the other is an alkylsulfonyl group, an arylsulfonyl group, or an acyl group.





    Search report