Photographic color developing compositions which are especially useful with high chloride photographic elements
AssigneeEastman Kodak Company
InventorsSheridan E. Vincent, Richard W. Berls
Life of this patent
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Abstract
Photographic color developing compositions which are especially useful in the processing of high chloride silver halide photographic elements are free, or at least substantially free, of bromides; optionally contain a small amount of sulfite; and comprise (1) a primary aromatic amino color developing agent, (2) an N,N-dialkylhydroxylamine, (3) at least one sequestering agent which functions to sequester iron and (4) at least one sequestering agent which functions to sequester calcium. The developing compositions exhibit excellent stability. They also provide minimal development restraint which permits the use of very short development times, as needed for rapid access processing.
Claims25
A photographic color developing composition which is especially useful in the development of high chloride silver halide photographic elements, said composition being substantially free of bromides and comprising:
- (1) a primary aromatic amino color developing agent,
- (2) N,N-diethylhydroxylamine,
- (3) at least one sequestering agent which functions to sequester iron,
- (4) at least one sequestering agent which functions to sequester calcium, and (5) from zero to 0.2 moles of sulfite per mole of said primary aromatic amino color developing agent.
A photographic color developing composition which is especially useful in the development of high chloride silver halide photographic elements, said composition being substantially free of bromides and benzyl alcohol and comprising:
- (1) a primary aromatic amino color developing agent,
- (2) N,N-diethylhydroxylamine,
- (3) an aromatic polyhydroxy compound that forms a complex with ferric ion in alkaline solution in which the molar ratio of the ferric ion to the aromatic polyhydroxy compound is 1 to 3,
- (4) at least one aminopolycarboxylic acid sequestering agent,
- (5) at least one pH buffering agent, and
- (6) from zero to 0.2 moles of sulfite per mole of said primary aromatic amino color developing agent.
A photographic color developing composition which is especially useful for the development of high chloride silver halide photographic elements, said composition being substantially free of bromides and benzyl alcohol and comprising:
- (1) 4-(N-ethyl-N-2-methanesulfonylaminoethyl)-2-methylphenylenediamine sesquisulfate monohydrate,
- (2) N,N-diethylhydroxylamine,
- (3) 5,6-dihydroxy-1,2,4-benzenetrisulfonic acid trisodium salt,
- (4) the disodium salt of ethylenediaminetetraacetic acid,
- (5) the lithium salt of sulfonated polystyrene,
- (6) triethanolamine,
- (7) potassium sulfite in an amount of up to 0.2 moles per mole of 4-(N-ethyl-N-2-methanesulfonylaminoethyl)-2-methylphenylenediamine sesquisulfate monohydrate, and
- (8) potassium carbonate.
A method of rapid access processing of a high chloride silver halide photographic color element, said method comprising the steps of:
- (1) developing said element for a period of about 30 to about 60 seconds at a temperature of about 30.degree. C. to about 40.degree. C. in a color developing composition having a pH in the range of from about 9 to about 13, said color developing composition being substantially free of bromides and comprising:
- (a) a primary aromatic amino color developing agent,
- (b) N,N-diethylhydroxylamine,
- (c) at least one sequestering agent which functions to sequester iron,
- (d) at least one sequestering agent which functions to sequester calcium, and
- (e) from zero to 0.2 moles of sulfite per mole of said primary aromatic amino color developing agent;
- (2) bleach-fixing said element, without washing between the developing and bleach-fixing steps, for a period of about 30 to about 60 seconds at a temperature of about 25.degree. C. to about 40.degree. C. in a bleach-fix composition having a pH in the range of from about 5 to about 8 and comprising a thiosulfate fixing agent and a ferric complex of an aminopolycarboxylic acid that functions as a bleaching agent;
- and
- (3) stabilizing said element, without washing between the bleach-fixing and stabilizing steps, for a period of about 60 to about 120 seconds at a temperature of from about 25.degree. C. to about 40.degree. C. in a stabilizing composition having a pH in the range of from about 5 to about 8 and comprising an aldehyde that functions as a stabilizing agent.
A method of rapid access processing of a high chloride silver halide photographic color element, said method comprising the steps of:
- (1) developing said element for a period of about 30 to about 60 seconds at a temperature of about 30.degree. C. to about 40.degree. C. in a color developing composition having a pH in the range of from about 9 to about 13, said color developing composition being substantially free of bromides and benzyl alcohol and comprising:
- (1) a primary aromatic amino color developing agent,
- (2) N,N-diethylhydroxylamine,
- (3) an aromatic polyhydroxy compound that forms a complex with ferric ion in alkaline solution in which the molar ratio of the ferric ion to the aromatic polyhydroxy compound is 1 to 3,
- (4) at least one aminopolycarboxylic acid sequestering agent,
- (5) at least one pH buffering agent, and
- (6) from zero to 0.2 moles of sulfite per mole of said primary aromatic amino color developing agent;
- (2) bleach-fixing said element, without washing between the developing and bleach-fixing steps, for a period of about 30 to about 60 seconds at a temperature of about 25.degree. C. to about 40.degree. C. in a bleach-fix composition having a pH in the range of from about 5 to about 8 and comprising a thiosulfate fixing agent and a ferric complex of an aminopolycarboxylic acid that functions as a bleaching agent;
- and
- (3) stabilizing said element, without washing between the bleach-fixing and stabilizing steps, for a period of about 60 to about 120 seconds at a temperature of from about 25.degree. C. to about 40.degree. C. in a stabilizing composition having a pH in the range of from about 5 to about 8 and comprising an aldehyde that functions as a stabilizing agent.
A method of rapid access processing of a high chloride silver halide photographic color paper, said method comprising the steps of:
- (1) developing said color paper for a period of about 45 seconds at a temperature of about 35.degree. C. in a color developing composition having a pH of about 10, said color developing composition being substantially free of bromides and benzyl alcohol and comprising:
- (a) 4-(N-ethyl-N-2-methanesulfonylaminoethyl)-2-methylphenylenediamine sesquisulfate monohydrate,
- (b) N,N-diethylhydroxylamine,
- (c) 5,6-dihydroxy-1,2,4-benzenetrisulfonic acid trisodium salt,
- (d) the disodium salt of ethylenediaminetetraacetic acid,
- (e) the lithium salt of sulfonated polystyrene,
- (f) triethanolamine,
- (g) potassium sulfite in an amount of up to 0.2 moles per mole of 4-(N-ethyl-N-2-methanesulfonylaminoethyl)-2-methylphenylenediamine sesquisulfate monohydrate, and
- (h) potassium carbonate;
- (2) bleach-fixing said color paper, without washing between the developing and bleach-fixing steps, for a period of about 45 seconds at a temperature of about 35.degree. C. in a bleach-fix composition having a pH of about 6 and comprising ammonium thiosulfate and the ammonium salt of a ferric complex of ethylenediaminetetraacetic acid;
- and
- (3) stabilizing said color paper, without washing between the bleach-fixing and stabilizing steps, for a period of about 90 seconds at a temperature of about 35.degree. C. in a stabilizing composition having a pH of about 7 and comprising formaldehyde, sodium metabisulfite, potassium hydroxide, diethylene glycol, 5-chloro-2-methyl-4-isothiazolin-3-one, the disodium salt of ethylenediaminetetraacetic acid, and 1-hydroxyethylidene-1,1-diphosphonic acid.
Dependencies are inferred from the claim text.