US4845020A
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Method of processing silver halide photographic material using an organic compound which loses its development restraining function by reaction with an oxidized developer
Assignee: Fujifilm Holdings Corp
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Filing: 1987-07-24
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Granted: 1989-07-04
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Expires: 2007-07-24
Abstract
Abstract A method of processing a silver halide photographic material comprising processing the silver halide photographic material in the presence of an antifoggant which is an organic compound which loses its developing restraining function by a reduction oxidation reaction with oxidized developers. The method improves the discrimination between image and non-image areas of the silver halide photographic material by the novel antifoggant which restrains fog selectively in non-image areas without decreasing photographic sensitivity and image density. The organic compound can be an anti-foggant which possesses a moiety according to the Kendall-Pelz rule and either a mercapto group or a cyclic NH group.
Inventors
- 👤 Isamu Itoh
- 👤 Keiji Mihayashi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 16:01
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/305; G03C1/00; G03C1/005; G03C1/06; G03C1/34; Y; Y10; Y10S; Y10S430/00; Y10S430/156; Y10S430/158; Y10S430/161
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
37 words
A method of processing a silver halide photographic material comprising processing said silver halide photographic material in the presence of an organic compound which loses its development restraining function by a reduction oxidation reaction with oxidized developers.
Claim 2
Independent Claim
37 words
A method of processing a silver halide photographic material comprising processing said silver halide photographic material in the presence of an organic compound which loses its development restraining function by a reduction oxidation reaction with oxidized developers.
Claim 3
Dependent Claim
66 words
A method of processing a silver halide photographic material as in claim 1, wherein said organic compound is an antifoggant which possesses a moiety according to the Kendall-Pelz rule and a moiety of either a mercapto group or a cyclic NH group and loses its function to be adsorbed on silver halide grains when converted to an oxidized form by a redox reaction with oxidized developers.
Claim 4
Dependent Claim
286 words
A method of processing a silver halide photographic material as in claim 1, wherein said organic compound is represented by the formula (I): ##STR21## wherein a 1 and b 1 each represent a hydroxy group, a group which provides a hydroxy group upon hydrolysis or a substituted or unsubstituted amino group (Y 1 can be a substituent of the amino group); Z 1 represents ##STR22## or ═N--, in which R 1 represents a hydrogen atom or a substituent; n 1 represents an integer of 0 to 5; Y 1 represents a group having at least one substituent selected from the group consisting of a mercapto group and a cyclic amino group in which the nitrogen is unsubstituted; m 1 represents 0 or 1, and when m 1 represents 0, the carbon atom to which Y 1 is bonded may have another substituent; when n 1 represents 0, at least one of a 1 and b 1 represents an amino group substituted with Y 1 ; when m 1 represents 0, at least one of a 1 and b 1 represents an amino group substituted with Y 1 ; when n 1 is 1 and m 1 is 0, at least one of a 1 and b 1 represents an amino group substituted with Y 1 ; when n 1 represents an integer of 2 to 5, the repeating unit ##STR23## may be the same or different, and may form a single ring or condensed ring, and contain at least one Y 1 in the repeating units, or when Y 1 is not present in the whole repeating units, at least one of a 1 and b 1 represents an amino group substituted with Y 1 .
Claim 5
Dependent Claim
116 words
A method of processing a silver halide photographic material as in claim 3, wherein Y 1 is represented by formula (II) or (III): ##STR24## wherein L 1 and L 2 each represents a linking group, l and m each represents an integer of 0 to 2, X 1 and X 2 each represents a non-metallic atomic group necessary for forming a 4-membered to 7-membered ring and one or more other rings may be condensed further to the ring above and L 1 and L 2 can be connected to the condensed ring or rings; R 2 and R 3 represent a hydrogen atom or a group capable of becoming a hydrogen atom under an alkaline condition.
Claim 6
Dependent Claim
58 words
A method of processing a silver halide photographic material as in claim 2, wherein said organic compound possesses a moiety according to the Kendall-Pelz rule which is derived from a compound selected from the group consisting of hydroxylamines, catechols, o-aminophenols, o-phenylenediamines, 2-amino-1-naphthols, ascorbic acids, 1,2-dihydroxynaphthols, α-ketols, α-aminoketones, hydroquinones, p-aminophenols, p-phenylenediamines, 1,4-dihydroxynaphthalenes, 4-amino-1-naphthols, 4,4'-dihydroxybiphenyl, 5-amino-1-naphthols, 1,5-dihydroxynaphthalenes, 3-pyrazolidones and 3-amino-2-pyrazolines.
Claim 7
Dependent Claim
44 words
A method of processing a silver halide photographic material as in claim 2, wherein said organic compound possesses a moiety according to the Kendall-Pelz rule which is derived from a compound selected from the group consisting of catechols, o-aminophenols, hydroquinones, p-aminophenols, 1,4-dihydroxynaphthalenes and 4-amino-1-naphthols.
Claim 8
Dependent Claim
25 words
A method of processing a silver halide photographic material as in claim 2, wherein said organic compound is incorporated into a silver halide photographic material.
Claim 9
Dependent Claim
29 words
A method of processing a silver halide photographic material as in claim 7, wherein said organic compound is a precursor having a blocked mercapto group on a heterocyclic nucleus.
Claim 10
Dependent Claim
42 words
A method of processing a silver halide photographic material as in claim 7, wherein said organic compound having a mercapto group on a heterocyclic nucleus is incorporated in an amount of about 10 -9 to 10 -1 mol per mol of silver.
Claim 11
Dependent Claim
39 words
A method of processing a silver halide photographic material as in claim 7, wherein said organic compound having a cyclic NH group is incorporated in an amount of about 10 -8 to 10 -1 mol per mol of silver.
Claim 12
Dependent Claim
39 words
A method of processing a silver halide photographic material as in claim 1, wherein said organic compound is added to a developing solution as a developing component in an amount of about 10 -4 to 1 mol per liter.
References Cited (Backward Citations)
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| 3.5 Years (Year 4) | 1992-07-03 | 1993-01-02 | 1993-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-07-03 | 1997-01-02 | 1997-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-07-03 | 2001-01-02 | 2001-07-04 | $7700.00 | Window Closed / Lapsed |