US4855218A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for processing silver halide photographic lightsensitive materials
Assignee: Fujifilm Holdings Corp
•
Filing: 1988-02-10
•
Granted: 1989-08-08
•
Expires: 2008-02-10
Abstract
Abstract A method for processing silver halide photographic lightsensitive material in which there are used replenishers for water washing and/or stabilization processes in such manner that the concentrations of calcium and magnesium compounds present in the replenishers are not more than 5 mg/l on the basis of elemental calcium and magnesium respectively, and a part or whole of the overflow from the water washing and/or stabilization process is introduced into a process preceding the water washing and/or stabilization processes. This method makes it possible to save water, to diminish the amount of waste liquor and to make effective use of components contained in processing solutions, without impairing any properties of lightsensitive materials to be processed.
Inventors
- 👤 Yoshihiro Fujita
- 👤 Akira Abe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:28
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/44
Claims Analysis
Total Claims: 13
Claim 1
Independent Claim
84 words
A method for processing silver halide photographic lightsensitive materials in which there are used replenishers for water washing and/or stabilization processes in such a manner that the concentrations of calcium and magnesium compounds in the replenishers are not more than 5 mg/l on the basis of elemental calcium and magnesium respectively, and a part or whole of overflow from the water washing and/or stabilization processes is introducing into a treating process having fixing ability and which is preceding the water washing and/or stabilization processes.
Claim 2
Independent Claim
84 words
A method for processing silver halide photographic lightsensitive materials in which there are used replenishers for water washing and/or stabilization processes in such a manner that the concentrations of calcium and magnesium compounds in the replenishers are not more than 5 mg/l on the basis of elemental calcium and magnesium respectively, and a part or whole of overflow from the water washing and/or stabilization processes is introducing into a treating process having fixing ability and which is preceding the water washing and/or stabilization processes.
Claim 3
Dependent Claim
45 words
A method for processing according to claim 1 wherein the amount of the replenisher for the water washing and/or stabilization processes is 1 to 50 times the volume of liquid carried over, from the preceding process, by the processed lightsensitive material per unit area thereof.
Claim 4
Dependent Claim
29 words
A method for processing according to claim 1 wherein the water washing and/or stabilization processes comprise a plurality of baths and the replenishment is effected by multistage countercurrent system.
Claim 5
Dependent Claim
47 words
A method for processing according to claim 1 wherein the concentrations of calcium and magnesium compounds present in a replenisher for the fixing process just before the water washing and/or stabilization processes, is not more than 5 mg/l on the basis of elemental calcium and magnesium respectively.
Claim 6
Dependent Claim
41 words
A method for processing according to claim 1 wherein the concentrations of calcium and magnesium present in the replenisher for the water washing and/or stabilization processes are not more than 3 mg/l on the basis of elemental calcium and magnesium respectively.
Claim 7
Dependent Claim
29 words
A method for processing according to claim 1 wherein the water washing or the stabilization process is effected at 20° to 50° C. for 10 seconds to 10 minutes.
Claim 8
Dependent Claim
32 words
A method for processing according to claim 1 wherein the amount of the overflow introduced into the preceding bath is 0.2 to 5 times that of a replenisher for the preceding bath.
Claim 9
Dependent Claim
23 words
A method for processing according to claim 1 wherein the replenisher for the water washing and/or stabilization processes further contains an ammonium compound.
Claim 10
Dependent Claim
26 words
A method for processing according to claim 8 wherein the amount of the ammonium compound is in the range of from 1×10 -3 to 0.5 moles/l.
Claim 11
Dependent Claim
16 words
A method for processing according to claim 8 wherein the ammonium compound is an ammonium salt.
Claim 12
Dependent Claim
20 words
A method for processing according to claim 8 wherein the ammonium compound is ammonium sulfate, ammonium chloride or ammonium sulfite.
Claim 13
Dependent Claim
19 words
A method for processing according to claim 8 wherein the replenisher for the stabilization process comprises an aldehyde compound.
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) | 1992-08-07 | 1993-02-06 | 1993-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-08-07 | 1997-02-06 | 1997-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-08-07 | 2001-02-06 | 2001-08-08 | $7700.00 | Window Closed / Lapsed |