Process for rapid access development of silver halide films using pyridinium as development accelerators

U.S. Patent Number: 5384232

Abstract: A process of developing exposed silver halide elements comprises developing said element in a developer in the presence of a development accelerator compound as defined. The development accelerator compounds include pyridinium, or pyridinium and and imidazolium compounds. The process is applicable to standard and hydrazine-containing films and to hydroquinone and/or ascorbic acid-based developers. The development accelerator may be incorporated into the developer or into the silver halide emulsion.

Inventors: Bishop; Julie C. (Old Bridge, NJ), Chan; Dominic M. (Wilmington, DE), Donald; Dennis S. (Mendenhall, PA), Fodor; Ludovic (Monmouth Junction, NJ), Pangratz; William R. (Middletown, NJ), Russo; Glenn M. (Mullica Hill, NJ), Shock; John R. (Princeton Junction, NJ)

Assignee: E. I. Du Pont de Nemours and Company (Wilmington, DE)

Application Number: 08/040,247

Issued: 1995-01-24

Expired: 2007-01-24

Classes: 430/440 ; 430/446; 430/480; 430/483; 430/485; 430/487; 430/963

Field of search: 430/264,442,469,487,564,963,436,438,440,481,483,485,478,598,604,605,480,484,435

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