USRE30064EExpiredUtility

Process for color photographic processing

Priority: Feb 24, 1976Filed: Jul 3, 1978Granted: Aug 7, 1979
Est. expiryFeb 24, 1996(expired)· nominal 20-yr term from priority
G03C 7/413
26
PatentIndex Score
5
Cited by
5
References
3
Claims

Abstract

A process for color photographic processing, which comprises subjecting an exposed silver halide color light-sensitive material to a color development using a color developer containing (1) an aromatic primary amine developing agent and (2) at least one organic compound having at least one phosphono group and at least one carboxy group in the molecule.

Claims

exact text as granted — not AI-modified
What is claimed is: 
     
       1. A process for color photographic processing, which comprises subjecting an imagewise exposed silver halide color light-sensitive material to a color development using a color developer containing; (1) a p-phenylenediamine developing agent or derivative thereof and   (2) at least one organic compound having at least one phosphono group and at least one carboxy group in the molecule selected from the group consisting of 2-phosphonobutane-1,2,4-tricarboxylic acid, 1-phosphonopropane-1,2, 3-tricarboxylic acid, 1-phosphonobutane-2,3,4-tricarboxylic acid, 1,1-diphosphonopropane-2,3-dicarboxylic acid, 2-phosphonobutane-2,3,4-tricarboxylic acid and 2,2-diphosphonobutane-3,4-dicarboxylic acid.   
     
     
       2. The process of claim 1, wherein said organic compound having at least one phosphono group and at least one carboxy group in the molecule is present in said color developer in an amount of about 0.01 g to about 50 g per liter of said color developer. 
     
     
       3. The process of claim 1, wherein said color developer has a pH ranging from about 7 to about 14. .[.4. The process of claim 1, wherein said aromatic primary amine developing agent is a p-phenylenediamine 
     
     
        derivative..]. 5. The process of claim 1, wherein the color developer 
     
     
        additionally contains a preservative. 6. The process of claim 5, wherein 
     
     
        said preservative is hydroxylamine. 7. The process of claim 5, wherein 
     
     
        said preservative is alkali metal sulfite. 8. The process of claim .[.4.]. .Iadd.1.Iaddend. , wherein said p-phenylenediamine .Iadd.derivative is N,N-diethyl-p-phenylenediamine .Iaddend.hydrochloride, 2-amino-5-diethylaminotoluene hydrochloride, 2-amino-5-(N-ethyl-N-laurylamino)toluene, 4-[N-ethyl-N-(β-hydroxyethyl)amino]aniline sulfate, 2-methyl-4-[N-ethyl-N-(β-hydroxyethyl)amino]aniline sulfate, N-ethyl-N-(β-methanesulfoamidoethyl)-3-methyl-4-aminoaniline sesquisulfate monohydrate, N-(2-amino-5-diethylaminophenylethyl)methanesulfonamide sulfate, N,N-dimethyl-p-phenylenediamine hydrochloride, 4-amino-3-methyl-N-ethyl-N-methoxyethylaniline, .[.4-amino-3-methyl-N-ethyl-N-μ-ethoxyethylaniline.]. .Iadd.4-amino-3-methyl-N-ethyl-N-β-ethoxyethylaniline.Iaddend., 4-amino-3-methyl-N-ethyl-N-β-butoxyethylaniline or the salts thereof. 
     
     
        . The process of claim 1, wherein said color developer additionally contains an alkali agent, a buffer agent, a development accelerator, a 
     
     
        sulfite, and/or an anti-fogging agent. 10. The process of claim 6, wherein the color developer contains hydroxylamine in an amount ranging from about 
     
     
        1×10 -3  to about 5×10 -2  mol/l. 11. The process of claim 6, wherein said organic compound having at least one phosphono group and at least one carboxy group in the molecule is .[.2-phosphono-1,2,4-tricarboxylic acid.]. 
     
     
        .Iadd.2-phosphonobutane-1,2,4-tricarboxylic acid.Iaddend.. 12. The process of claim 1, wherein the color developer additionally contains hydroxylamine.

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