US5318880A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of processing a photographic element with a peracid bleach
Assignee: Eastman Kodak Co
•
Filing: 1992-06-01
•
Granted: 1994-06-07
•
Expires: 2012-06-01
Abstract
Abstract This invention provides a method of processing a negative color silver halide photographic element comprising taking an exposed color silver halide photographic element with a speed greater than ISO 180 or containing at least one spectrally sensitized silver halide emulsion with a tabularity greater than 100, wherein the photographic element comprises a total amount of incorporated silver and incorporated vehicle of 20 g/m 2 film or less; developing the exposed photographic material; and bleaching the exposed, developed photographic element with a peracid bleach in the presence of a bleach accelerator.
Inventors
- 👤 Daniel R. English
- 👤 Richard P. Szajewski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:01
CPC Classifications
G; G03; G03C; G03C7/00; G03C7/30; G03C7/42; G03C7/3022; G03C1/00; G03C1/005; G03C1/0051; G03C2001/0055; G03C1/76; G03C1/7614; G03C2001/7635; G03C2007/3025; G03C2200/00; G03C2200/27; G03C2200/35
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
91 words
A method of processing a negative color silver halide photographic element comprising taking an exposed color silver halide photographic element with a speed greater than ISO 180 or containing at least one spectrally sensitized silver halide emulsion with a tabularity greater than 100, wherein the photographic element comprises a total amount of incorporated silver and incorporated vehicle of 20 g/m 2 film or less; developing the exposed photographic element; and bleaching the exposed, developed photographic element with a peracid bleach in the presence of a bleach accelerator which accelerates peracid bleaches.
Claim 2
Independent Claim
91 words
A method of processing a negative color silver halide photographic element comprising taking an exposed color silver halide photographic element with a speed greater than ISO 180 or containing at least one spectrally sensitized silver halide emulsion with a tabularity greater than 100, wherein the photographic element comprises a total amount of incorporated silver and incorporated vehicle of 20 g/m 2 film or less; developing the exposed photographic element; and bleaching the exposed, developed photographic element with a peracid bleach in the presence of a bleach accelerator which accelerates peracid bleaches.
Claim 3
Dependent Claim
18 words
The method of claim 1 wherein the silver halide photographic element has a speed greater than ISO 180.
Claim 4
Dependent Claim
26 words
The method of claim 1 wherein the silver halide photographic element contains at least one spectrally sensitized silver halide emulsion with a tabularity greater than 100.
Claim 5
Dependent Claim
13 words
The method of claim 1 wherein the peracid bleach is a persulfate bleach.
Claim 6
Dependent Claim
17 words
The method of claim 4 wherein the persulfate bleach is a sodium, potassium, or ammonium persulfate bleach.
Claim 7
Dependent Claim
17 words
The method of claim 1 wherein the amount of vehicle is 2 to 15 g/m 2 .
Claim 8
Dependent Claim
16 words
The method of claim 1 wherein the photographic material is bleached for 20 to 260 seconds.
Claim 9
Dependent Claim
16 words
The method of claim 1 wherein the photographic material is bleached for 20 to 120 seconds.
Claim 10
Dependent Claim
16 words
The method of claim 1 wherein the concentration of the peracid is 0.01 to 1.0 moles/liter.
Claim 11
Dependent Claim
16 words
The method of claim 1 wherein the concentration of the peracid is 0.05 to 0.50 moles/liter.
Claim 12
Dependent Claim
18 words
The method of claim 1 wherein the amount of silver is less than 10 g/m 2 of film.
Claim 13
Dependent Claim
18 words
The method of claim 1 wherein the amount of silver is less than 5 g/m 2 of film.
Claim 14
Dependent Claim
17 words
The method of claim 1 wherein the photographic element comprises the bleach accerator or a precursor thereof.
Claim 15
Dependent Claim
19 words
The method of claim 13 wherein the concentration of the bleach accelerator is 0.05 to 0.5 g/m 2 .
Claim 16
Dependent Claim
14 words
The method of claim 1 wherein the spectrally sensitized silver halide emulsion comprises iodide.
Claim 17
Dependent Claim
19 words
The method of claim 1 wherein the bleach accelerator is contained in a bleach pre-bath or the bleaching solution.
Claim 18
Dependent Claim
17 words
The method of claim 16 wherein the concentration of the bleach accelerator is 0.005 to 0.05 moles/liter.
Claim 19
Dependent Claim
18 words
The method of claim 1 wherein the spectrally sensitized silver halide emulsion has a tabularity greater than 200.
Claim 20
Independent Claim
133 words
A method of processing a negative color silver halide photographic element comprising taking an exposed color silver halide photographic element with a speed greater than ISO 180 or containing at least one spectrally sensitized silver halide emulsion with a tabularity greater than 100, wherein the photographic element comprises a total amount of incorporated silver and incorporated vehicle of 20 g/m 2 film or less with the amount of vehicle being 2 to 15 g/m 2 and the amount of silver being less than 10 g/m 2 ; developing the photographic element; and bleaching the exposed developed photographic element in a sodium, potassium, or ammonium persulfate bleach in the presence of a bleach accelerator which accelerates peracid bleaches for 20 to 260 seconds, wherein the concentration of the persulfate is 0.01 to 1.0 moles/liter.
Claim 21
Independent Claim
133 words
A method of processing a negative color silver halide photographic element comprising taking an exposed color silver halide photographic element with a speed greater than ISO 180 or containing at least one spectrally sensitized silver halide emulsion with a tabularity greater than 100, wherein the photographic element comprises a total amount of incorporated silver and incorporated vehicle of 20 g/m 2 film or less with the amount of vehicle being 2 to 15 g/m 2 and the amount of silver being less than 10 g/m 2 ; developing the photographic element; and bleaching the exposed developed photographic element in a sodium, potassium, or ammonium persulfate bleach in the presence of a bleach accelerator which accelerates peracid bleaches for 20 to 260 seconds, wherein the concentration of the persulfate is 0.01 to 1.0 moles/liter.
Claim 22
Dependent Claim
18 words
The method of claim 19 wherein the silver halide photographic element has a speed greater than ISO 180.
Claim 23
Dependent Claim
26 words
The method of claim 19 wherein the silver halide photographic element contains at least one spectrally sensitized silver halide emulsion with a tabularity greater than 100.
Claim 24
Dependent Claim
16 words
The method of claim 19 wherein the concentration of the persulfate is 0.05 to 0.50 moles/liter.
Claim 25
Dependent Claim
18 words
The method of claim 19 wherein the amount of silver is less than 5 g/m 2 of film.
Claim 26
Dependent Claim
17 words
The method of claim 19 wherein the photographic element comprises the bleach accelerator or a precursor thereof.
Claim 27
Dependent Claim
19 words
The method of claim 24 wherein the concentration of the bleach accelerator is 0.05 to 0.5 g/m 2 .
Claim 28
Dependent Claim
14 words
The method of claim 19 wherein the spectrally sensitized silver halide emulsion comprises iodide.
Claim 29
Dependent Claim
19 words
The method of claim 19 wherein the bleach accelerator is contained in a bleach pre-bath or the bleaching solution.
Claim 30
Dependent Claim
17 words
The method of claim 27 wherein the concentration of the bleach accelerator is 0.005 to 0.05 moles/liter.
Claim 31
Dependent Claim
18 words
The method of claim 21 wherein the spectrally sensitized silver halide emulsion has a tabularity greater than 200.
References Cited (Backward Citations)
US4439520A
Cited
EP0206049A2
Cited
US4745048A
Cited
US4695529A
Cited
US4762774A
Cited
US4952488A
Cited
US4780403A
Cited
US5011763A
Cited
WO1991006037A1
Cited
US5219715A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-06-06 | 1997-12-06 | 1998-06-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-06-06 | 2001-12-06 | 2002-06-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-06-06 | 2005-12-06 | 2006-06-07 | $7700.00 | Window Closed / Lapsed |