US4362811A
Expired / Lapsed
US
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Processing solution composition for silver complex diffusion transfer process
Assignee: Mitsubishi Paper Mills Ltd
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Filing: 1981-07-10
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Granted: 1982-12-07
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Expires: 2001-07-10
Abstract
Abstract A processing solution composition for treating an image receiving layer in silver complex diffusion transfer process, which contains 1.7x10-3 to 1.7x10-2 mole/liter of a bromide and 2.0 to 12.0 mole-% of potassium ion based on total cations of the salts contained in the composition accelerates the transfer speed and gives a silver image high in maximum density, contrast and sharpness to the image.
Inventors
- 👤 Shigeru Iguchi
- 👤 Shozi Oka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 15:22
CPC Classifications
G; G03; G03C; G03C8/00; G03C8/02; G03C8/04; G03C8/06
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
72 words
A silver complex diffusion transfer processing solution composition containing substantially no developing agent which comprises: (1) an alkaline substance, (2) an alkali metal sulfite, (3) a solvent for silver halides which is other than sulfite, (4) 1.7×10 -3 to 1.7×10 -2 mole/liter of a bromide, (5) a content of potassium ion of 2.0 to 12.0 mol % based on the total cations of the salts contained in the composition, and (6) water.
Claim 2
Dependent Claim
72 words
A silver complex diffusion transfer processing solution composition containing substantially no developing agent which comprises: (1) an alkaline substance, (2) an alkali metal sulfite, (3) a solvent for silver halides which is other than sulfite, (4) 1.7×10 -3 to 1.7×10 -2 mole/liter of a bromide, (5) a content of potassium ion of 2.0 to 12.0 mol % based on the total cations of the salts contained in the composition, and (6) water.
Claim 3
Dependent Claim
21 words
A silver complex diffusion transfer processing solution composition according to claim 1 wherein the solvent (3) is an alkali metal thiosulfate.
Claim 4
Dependent Claim
19 words
A silver complex diffusion transfer processing solution composition according to claim 1 wherein the sulfite (2) is sodium sulfite.
Claim 5
Dependent Claim
19 words
A silver complex diffusion transfer processing solution composition according to claim 1 wherein the solvent (3) is sodium thiosulfate.
Claim 6
Dependent Claim
37 words
A silver complex diffusion transfer processing solution composition according to claim 1 wherein the content of potassium ion (5) is 6 to 10 mol % based on the total cations of the salts contained in the composition.
Claim 7
Dependent Claim
26 words
A silver complex diffusion transfer processing solution composition according to claim 1 wherein the content of the bromide (4) is 3×10 -3 to 1.2×10 -2 mol/liter.
Claim 8
Dependent Claim
25 words
A silver complex diffusion transfer processing solution composition according to claim 1 which contains salts compounds other than those of (1), (2), (3), and (4).
Claim 9
Dependent Claim
33 words
A silver complex diffusion transfer processing solution composition according to claim 1 which additionally contains at least one member selected from a thickener, a toning agent, a developer modifier, and a developer accelerator.
Claim 10
Dependent Claim
36 words
A silver complex diffusion transfer processing solution composition according to claim 8 including a toning agent and wherein the toning agent is a mercapto compound and is contained in an amount not more than one gram/liter.
Claim 11
Dependent Claim
36 words
A silver complex diffusion transfer processing solution composition according to claim 8 including a developer modifier and wherein the developer modifier is a heterocyclic compound and is contained in an amount not more than one gram/liter.
Claim 12
Dependent Claim
18 words
A silver complex diffusion transfer processing solution composition according to claim 1 which has a pH of 10-14.
Claim 13
Dependent Claim
16 words
A silver complex diffusion transfer processing solution composition according to claim 1 which contains an aminoalcohol.
Claim 14
Dependent Claim
35 words
A silver complex diffusion transfer processing solution composition according to claim 12 wherein the aminoalcohol is represented by the general formula: R-NH-CH 2 H 4 OH wherein R is a C 1 -C 4 alkyl.
Claim 15
Dependent Claim
25 words
A silver complex diffusion transfer processing solution composition according to claim 13 wherein the content of the aminoalcohol is about 0.06 to about 0.3 mol/liter.
Claim 16
Dependent Claim
29 words
A silver complex diffusion transfer processing solution composition according to claim 1 wherein the sulfite (2) is sodium sulfite or potassium sulfite and the solvent (3) is sodium thiosulfate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-12-06 | 1986-06-07 | 1986-12-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-06 | 1990-06-07 | 1990-12-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-06 | 1994-06-07 | 1994-12-07 | $7700.00 | Window Closed / Lapsed |