# US 5,344,750 A · Color development processing method of silver halide color photographic material using a color developer where the color developing agent concentration and processing temperature are a function of bromide ion concentration > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 5,344,750 A - Document ID: US5344750A - Status: Granted - Kind: A - Application number: 08/059,262 - Filed: 1993-05-11 - Granted: 1994-09-06 - Earliest claimed: 1992-05-12 - Assignees: Fuji Photo Film Co., Ltd. - Inventors: Hiroshi Fujimoto; Masato Taniguchi - Web page: https://patentgrep.com/patent/US5344750A ## CPC - G03C 7/413: Developers - G03C 1/07: Substances influencing grain growth during silver salt formation - G03C 2200/26: Gamma - G03C 2200/52: Rapid processing - Y10S 430/164: Rapid access processing - G03C: PHOTOSENSITIVE MATERIALS FOR PHOTOGRAPHIC PURPOSES (for photomechanical purposes G03F); PHOTOGRAPHIC PROCESSES, e.g. CINE, X-RAY, COLOUR, STEREO-PHOTOGRAPHIC PROCESSES; AUXILIARY PROCESSES IN PHOTOGRAPHY (photographic processes characterised by the use or manipulation of apparatus classifiable per se in subclass G03B, see G03B; photomechanical production of textured or patterned surfaces G03F; electrophotography, magnetography G03G) - Y10S: TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS ## Abstract A color development process for processing an imagewise exposed silver halide color photographic material comprising a support having thereon at least one light-sensitive silver halide emulsion layer comprising a color coupler and a silver iodobromide emulsion containing silver iodide in an amount of from 2 to 20 mol %, comprising the step of processing the color photographic material in a color developing solution containing a color developing agent and bromide ion for 40 seconds to 90 seconds, wherein the color developing agent is represented by formula (D'): ##STR1## wherein R.sub.1d, and R.sub.2d, each represents an alkyl group having 1 to 4 carbon atoms; and L.sub.1 represents a straight-chain or branched alkylene group having 3 or 4 carbon atoms, the concentration {Br.sup.- } of bromide ion in the color developing solution is from 30 to 60 mmol/l, the relationship between the concentration {R} of the color developing agent in the color developing solution and the concentration {Br.sup.- } of bromide ion in the color developing solution and the relationship between the development processing temperature Tem and the concentration {Br.sup.- } of bromide ion are maintained to satisfy a Rule defined by the following equations: {R}=((0.63.times.{Br.sup.- })+(14)).+-.16 (mmol/l); Tem=((0.19.times.{Br.sup.- })+(39)).+-.5 (.degree.C.), where {R} is the concentration of color developing agent in units of mmol/l; {Br.sup.- } is the concentration of bromide ion in units of mmol/l; and Tem is the development processing temperature in .degree.C. ## Claims ### Claim 1 A color development process for processing an imagewise exposed silver halide color photographic material comprising a support having thereon at least one light-sensitive silver halide emulsion layer comprising a color coupler and a silver iodobromide emulsion containing silver iodide in an amount of from 2 to 20 mol %, comprising the step of processing the color photographic material in a color developing solution containing a color developing agent and bromide ion for 40 seconds to 90 seconds, wherein the color developing agent is represented by formula (D'): ##STR19## where R.sub.1d, R.sub.2d, each represents an alkyl group having 1 to 4 carbon atoms; and L.sub.1 represents a straight-chain or branched alkylene group having 3 or 4 carbon atoms; the concentration {Br.sup.- } of bromide ion in the color developing solution is from 30 to 60 mmol/l; the relationship between the concentration {R} of the color developing agent in the color developing solution and the concentration {Br.sup.- } of bromide ion in the color developing solution and the relationship between the development processing temperature Tem and the concentration {Br.sup.- } of bromide ion are maintained to satisfy a Rule defined by the following equations: (Rule) {R}=((0.63.times.{Br.sup.- })+(14)).+-.16 (mmol/l) Tem=((0.19.times.{Br.sup.- })+(39)).+-.5 (.degree.C.) where {R} is the concentration of color developing agent in units of mmol/l; {Br.sup.- } is the concentration of bromide ion in units of mmol/l; and Tem is the development processing temperature in .degree.C. ### Claim 2 (depends on 1) A color development process as in claim 1, wherein the concentration {Br.sup.- } of bromide ion in the color developing solution is from 43 to 60 mmol/l. ### Claim 3 (depends on 1) A color development process as in claim 1, wherein the development time is 45 seconds to 60 seconds. ### Claim 4 (depends on 1) A color development process as in claim 1, wherein said color developing solution contains at least 0.1 g/l of one or more compounds represented by the following general formula (A): ##STR20## wherein R.sub.1a represents a methyl group, an ethyl group or a propyl group; and R.sub.2a represents a hydrogen atom; or R.sub.1a and R.sub.2a together form a five-membered or six-membered ring through an group. ### Claim 5 (depends on 4) A color development process as in claim 4, wherein the color developing solution contains 0.1 to 0.8 g/l of the compound represented by formula (A). ### Claim 6 (depends on 1) A color development process as in claim 1, wherein said color developing solution contains at least one compound represented by formula (E): L.sub.1e --(A.sub.1e --L.sub.2e).sub.r --A.sub.2e --L.sub.3e (E) wherein L.sub.1e and L.sub.3e, which may be the same or different, each represents an alkyl group having 1 to 4 carbon atoms substituted by --OM.sub.e1, --SO.sub.3 M.sub.1e, --PO.sub.3 M.sub.2e M.sub.3e or COOM.sub.e1 ; L.sub.e2 represents an alkylene group, an arylene group, an aralkylene group, a heterocyclic group or a connecting group composed of these groups in combination; A.sub.1e and A.sub.2e each represent --S--; r represents an integer of 1 to 3; when r is 2 or more the individual (A.sub.1e --L.sub.2e) units may be the same or different; M.sub.1e, M.sub.2e and M.sub.3e, which may be the same or different, each represents a hydrogen atom or a counter cation. ### Claim 7 (depends on 6) A color development process as in claim 6, wherein the color developing solution contains the compound of formula (E) in an amount of 1.times.10.sup.-6 to 1.times.10.sup.-1 mol/l.