US005460919A  United States  Patent  [19J  Obi et al.  [lll  Patent Number:  5,460,919  [45]  Date of Patent:  Oct. 24, 1995  [54]  PROCESS OF FORMING  SUPER  IDGH-CONTRAST  NEGATIVE IMAGES  AND  SILVER HALIDE  PHOTOGRAPIDC  MATERIAL AND  DEVELOPER BEING  USED  THEREFOR  [75]  Inventors:  Naoki Obi,  Tokyo;  Yasuhiko Kojima,  Saitama;  Yasuo Shigemitsu,  Saitama;  Jun Takeuchi,  Saitama;  Kiyoshi  Suematsu,  Tokyo, all of  Japan  [73]  Assignee:  Dainippon  Ink  and Chemicals, Inc.,  Tokyo,Japan  [21]  Appl. No.:  278,823  [22]  Filed:  Jul.  22, 1994  [62]  Division of Ser.  No. 897,098,  Jun. 11, 1992,  Pat. No.  5,372,911.  [51]  Int. Cl. 6  .......................................................  G03C 1/06  [52]  U.S. Cl . ..........................  430/264;  430/442; 430/436;  430/480; 430/478;  430/487; 430/490;  430/268  [58]  Field of Search  .....................................  430/264, 442,  430/436,  480,478,487,490,268  Related U.S. Application  Data  [30]  Foreign Application  Priority Data  [56]  References Cited  U.S.  PATENT  DOCUMENTS  FOREIGN PATENT  DOCUMENTS  [57]  ABSTRACT  11 Claims, No Drawings  A process of  forming  a super  high-contrast  negative image  is  disclosed, which  comprises  the steps of  imagewise expos› ing a  negative-working  silver halide  photographic  material  comprising  a support having  thereon one or  more hydro› philic colloidal  layers, at least  one of the one  or more  hydrophilic colloidal  layers being a  negative-working  silver  halide emulsion  layer, and then  developing  the  photographic  material with  a  developer containing  an  aminophenol  derivative developing  agent and a reductone  compound  in  the existence  of an organic  compound having  a  negative  reduction potential.  A  negative-working  silver halide  pho› tographic material  and a  photographic  developer being  used  for the  image-forming  process are also  disclosed.  Primary  Examiner-Thomas  R.  Neville  Attorney, Agent,  or  Firm-Armstrong,  Westerman, Hattori,  McLeland  &  Naughton  3,628,960  12/1971  Phillippaerts  et al  ................... 430/571  4,130,429  12/1978 Van Doorselaer  ...................... 430/139  4,346,167  8/1982 Imatomi  et al  .........................  430/569  4,713,321  12/1987 Mifume  et al  ..........................  430/570  4,740,453  4/1988 Nakamura  et al. .  .................... 430/264  5,206,125  4/1993 Ogawa  ....................................  430/507  5,217,842  6/1993 Kojima  et al  ...........................  430/264  5,275,915  1/1994 Kojima  et al  ...........................  430/264  5,362,621  11/1994 Obi et  al  .................................  430/596  Jun. 13, 1991  [JP]  Japan  ....................................  3-141891  Jun. 24, 1991  [JP]  Japan  ....................................  3-151675  Sep. 2, 1991  [JP]  Japan  ....................................  3-221629  Nov.  26, 1991  [JP]  Japan  ....................................  3-310755  Feb. 10, 1992  [JP]  Japan  ......................................  4-23738  Feb. 18, 1992  [JP]  Japan  ......................................  4-30658  0476613  3/1992  European Pat. Off  .. 