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US4756918A
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Method for processing silver halide color photographic materials including a counter-current bleaching-fixation system
Assignee: Fujifilm Holdings Corp
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Filing: 1986-10-17
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Granted: 1988-07-12
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Expires: 2006-10-17
Abstract
Abstract The present invention, relates to a method for the bleaching-fixation processing of silver halide color photographic materials. The present invention provides for sufficient desilvering in a short period of time without deterioration of the photographic characteristic of the materials as processed while minimizing the amount of replenisher which is used. Accordingly, the present invention is a method for the processing of silver halide color photographic materials wherein, after the color-development, the material is processed by bleaching-fixation with at least two continuous bleaching-fixation baths to which a replenisher is fed in a countercurrent system, wherein the total bleaching-fixation processing time in the bleaching-fixation step is to be 0.37 minutes or more per g/m 2 of the silver amount coated on the material and wherein the processing time in the first bleaching-fixation bath is to be 45% or less of the total bleaching-fixation processing time.
Inventors
- 👤 Shinji Ueda
- 👤 Akira Abe
- 👤 Junya Nakajima
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 12:06
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/395; G03C5/3958; G03C7/00; G03C7/30; G03C7/42
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
170 words
A method for processing a silverhalide color photograhic material comprising subjecting a silver halide photographic material to color development followed by bleaching-fixation, said bleaching-fixation including passing the photographic material through a first bleaching-fixation bath then to at least one additional bleaching-fixation bath each bleaching-fixation bath containing a solution with at least one bleaching agent and at least one fixing agent, while adding replenisher to at least one of the additional bleaching-fixation baths and counter-currently introducing overflow solution from at least one of the additional bleaching-fixation baths to a preceding bleaching-fixation bath, wherein subsequent to color development and prior to or simultaneously with the contact of the material with the bleaching agent the material is contacted with a bleach accelerating amount of at least one bleach accelerator, wherein the total time for bleaching-fixation is at least 0.37 minutes per g/m 2 of silver contained in the treated photographic material and wherein the processing time in the first bleaching-fixation bath is about 10 to about 40% of the total time for bleaching-fixation.
Claim 2
Independent Claim
170 words
A method for processing a silverhalide color photograhic material comprising subjecting a silver halide photographic material to color development followed by bleaching-fixation, said bleaching-fixation including passing the photographic material through a first bleaching-fixation bath then to at least one additional bleaching-fixation bath each bleaching-fixation bath containing a solution with at least one bleaching agent and at least one fixing agent, while adding replenisher to at least one of the additional bleaching-fixation baths and counter-currently introducing overflow solution from at least one of the additional bleaching-fixation baths to a preceding bleaching-fixation bath, wherein subsequent to color development and prior to or simultaneously with the contact of the material with the bleaching agent the material is contacted with a bleach accelerating amount of at least one bleach accelerator, wherein the total time for bleaching-fixation is at least 0.37 minutes per g/m 2 of silver contained in the treated photographic material and wherein the processing time in the first bleaching-fixation bath is about 10 to about 40% of the total time for bleaching-fixation.
Claim 3
Dependent Claim
26 words
A method for processing a silver halide color photographic material as defined in claim 1 wherein the total bleaching-fixation processing time is 0.5 to 10 minutes.
Claim 4
Dependent Claim
492 words
A method for processing a silver halide color photographic material as defined in claim 1, wherein said at least one bleach accelerator is selected from the group consisting of formulae (I) to (IX) ##STR9## wherein R 1 and R 2 may be the same or different and each represent a hydrogen atom, a substituted or unsubstituted lower alkyl group; and n 1 is an integer of 1 to 3; or R 1 or R 2 may be bonded to each other to form a ring; ##STR10## wherein R 3 and R 4 have the same meanings as R 1 and R 2 in the formula (I); and n 2 is an integer of 1 to 3; or R 3 and R 4 may be bonded to each other to form a ring; ##STR11## wherein R 5 represents a hydrogen atom, a halogen atom, an amino group, a substituted or unsubstituted lower alkyl group or an alkyl group-containing amino group; ##STR12## wherein R 6 and R 7 may be the same or different and each are a hydrogen atom, an optionally substituted alkyl group, an optionally substituted phenyl group or an optionally substituted heterocyclic group; R 8 represents a hydrogen atom or an optionally substituted lower alkyl group; and R 9 represents a hydrogen atom or a carboxyl group; ##STR13## wherein R 10 , R 11 and R 12 may be same or different and each represent a hydrogen atom or a lower alkyl group; n 3 is an integer of 1 to 4; R 10 and R 11 or R 12 may be bonded to each other to form a ring; and X represents an amino group optionally having substituent(s) or an amino group, a sulfonic acid group or a carboxyl group; ##STR14## wherein R 13 and R 14 each represent a hydrogen atom, a hydroxyl group, a substituted or unsubstituted amino group, a carboxyl group, a sulfo group or a substituted or unsubstituted alkyl group; R 15 and R 16 each represent a hydrogen atom, a substituted or unsubstituted alkyl group or a substituted or unsubstituted acyl group; R 15 and R 16 may be bonded to each other to form a ring; M represents a hydrogen atom, an alkali metal atom or an ammonium group; and n 4 is an integer of from 2 to 5; ##STR15## wherein X represents N or C--R, and n 5 is an integer of from 0 to 5; R, R 17 , R 18 and R 19 each represent a hydrogen atom, a halogen atom, an amino group, a hydroxyl group, a carboxyl group, a sulfo group or a substituted or unsubstituted alkyl group; and R 20 and R 21 each represent a hydrogen atom, a substituted or unsubstituted alkyl group or acyl group; or R 20 and R 21 may be bonded to each other to form a ring with the proviso that R 20 and R 21 are not both hydrogen atoms.
Claim 5
Dependent Claim
28 words
A method for processing a silver halide color photographic material as defined in claim 3 wherein the bleaching-accelerator is added to at least one of the bleaching-fixation baths.
Claim 6
Dependent Claim
38 words
A method for processing a silver halide color photographic material as defined in claim 3 wherein the bleaching-accelerator is added to a pre-bath and the photograhic material is treated in said pre-bath after color development but before bleachingfixation.
Claim 7
Dependent Claim
30 words
A method for processing a silver halide color photographic material as defined in claim 5 wherein the bleaching accelerator is also added to at least one of the bleaching-fixation baths.
Claim 8
Dependent Claim
41 words
A method for processing a silver halide color photographic material as defined in claim 3, wherein the bleaching-accelerator is selected from at least one of, compounds containing a mercapto group or a disulfide bond, thiazolidine derivatives, thiourea derivatives and isothiourea derivatives.
Claim 9
Dependent Claim
27 words
A method for processing a silver halide color photographic material as defined in claim 7 wherein the total time for bleaching-fixation is from 0.5 to 8 minutes.
Claim 10
Dependent Claim
27 words
A method for processing a silver halide color photographic material as defined in claim 1, wherein each bleaching-fixation solution contains 0.1 to 2 moles/liter of bleaching agent.
Claim 11
Dependent Claim
37 words
A method for processing a silver halide color photographic material as defined in claim 9, wherein the bleaching agent is a ferric complex bleaching agent and the pH of each bleaching-fixation solution is from 5.0 to 9.0.
Claim 12
Dependent Claim
27 words
A method for processing a silver halide color photographic material as defined in claim 10, wherein the pH of the bleaching-fixation solutions is from 4.0 to 8.5.
Claim 13
Dependent Claim
36 words
A method for processing a silver halide color photographic material as defined in claim 9, wherein the bleaching agent is a persulfate bleaching agent and the pH of the bleaching-fixation solutions is from 1 to 8.5.
Claim 14
Dependent Claim
27 words
A method for processing a silver halide color photographic material as defined in claim 1, wherein each bleaching-fixation solution contains 0.2 to 4 moles/liter of fixing agent.
Claim 15
Dependent Claim
33 words
A method for processing a silver halide color photographic material as defined in claim 1, wherein said silver halide is silver iodobromide or silver iodochlorobromide containing 30 mole % or less silver iodide.
Claim 16
Dependent Claim
33 words
A method for processing a silver halide color photographic material as defined in claim 1, wherein said silver halide is silver iodobromide containing 2 mole % to 25 mole % of silver iodide.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-07-12 | 1992-01-11 | 1992-07-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-07-12 | 1996-01-11 | 1996-07-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-07-12 | 2000-01-11 | 2000-07-12 | $7700.00 | Window Closed / Lapsed |