US3708304A
Expired / Lapsed
US
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Use of divalent metal salt image amplifiers in photosensitive and thermosensitive elements
Assignee: Eastman Kodak Co
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Filing: 1970-06-03
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Granted: 1973-01-02
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Expires: 1990-06-03
Abstract
Abstract A divalent metal salt, such as zinc acetate, cadmium acetate or cupric acetate, in combination with an oxidation-reduction imageforming combination containing a heavy metal salt oxidizing agent, such as silver behenate, and a reducing agent, such as a bis-naphthol reducing agent, in a photosensitive and thermosensitive element suitable for dry processing with heat, provides increased image density with no adverse increase in background density. A combination of a bis- Beta -naphthol reducing agent and zinc acetate, cadmium acetate or cupric acetate in conjunction with a stable source of silver for physical development is useful in photosensitive elements for dry processing with heat. The element can contain a sensitizing dye, an activator-toning agent and other addenda employed in elements for dry processing with heat. A stable, developed image can be provided by heating the element after exposure. The photosensitive component can be photographic silver halide or other suitable photosensitive metal salts.
Inventors
- 👤 G Hiller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:33
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/494; G03C1/498; G03C1/49836; G03C1/49845; Y; Y10; Y10S; Y10S430/00; Y10S430/156; Y10S430/166
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
55 words
A photosensitive and thermosensitive element comprising a support having thereon a. an oxidation-reduction image-forming combination comprising (i) a silver salt oxidizing agent and (ii) a bis-beta-napthol reducing agent, b. a catalyst for said oxidation-reduction image-forming combination comprising photosensitive silver halide, c. a divalent metal salt image amplifier which comprises zinc acetate and d. a binder.
Claim 2
Dependent Claim
14 words
A photosensitive and thermosensitive element as in claim 2 also comprising an activator-toning agent.
Claim 3
Dependent Claim
17 words
A photosensitive and thermosensitive element as in claim 2 also comprising an activator-toning agent which is phthalimide.
Claim 4
Dependent Claim
24 words
A photosensitive and thermosensitive element as in claim 2 also comprising a stabilizer precursor which is an azole thioether or a blocked azole thione.
Claim 5
Dependent Claim
17 words
A photosensitive and thermosensitive element as in claim 2 also comprising a stabilizer precursor which is 5-acetyl-4-methyl-2-(3-oxobutylthio)thiazole.
Claim 6
Dependent Claim
59 words
A photosensitive and thermosensitive element comprising a support having thereon a. an oxidation-reduction image-forming combination comprising (i) an oxidizing agent comprising silver behenate and (ii) a reducing agent which is 2,2''-dihydroxy-1,1''-binaphthyl, b. photosensitive silver halide, c. a divalent metal salt image amplifier which is zinc acetate, d. polyvinyl butyral binder, e. phthalimide activator-toning agent, and f. a sensitizing dye.
Claim 7
Dependent Claim
14 words
A photosensitive and thermosensitive element as in claim 2 also comprising a sensitizing dye.
Claim 8
Dependent Claim
67 words
A photosensitive and thermosensitive element as in claim 2 comprising a support having thereon a. about 0.10 mole to about 2.0 moles of said reducing agent per mole of said catalyst, b. about 0.005 mole to about 0.50 mole of said catalyst per mole of said oxidizing agent and c. about 0.005 mole to about 0.20 mole of said zinc acetate per mole of said oxidizing agent.
Claim 9
Dependent Claim
51 words
A photosensitive and thermosensitive composition comprising: a. an oxidation-reduction image-forming combination comprising (i) a heavy metal salt oxidizing agent with (ii) a reducing agent, b. a photosensitive silver salt catalyst for said oxidation-reduction image-forming combination and c. a divalent metal salt image amplifier which is a zinc, copper or cadmium salt.
Claim 10
Dependent Claim
48 words
A photosensitive and thermosensitive composition comprising: a. an oxidation-reduction image-forming combination comprising (i) a silver salt oxidizing agent with (ii) a bis-beta-naphthol reducing agent, b. a catalyst for said oxidation-reduction image-forming combination comprising photosensitive silver halide and c. a divalent metal salt image amplifier which comprises zinc acetate.
Claim 11
Dependent Claim
14 words
A photosensitive and thermosensitive composition as in claim 11 also comprising an activator-toning agent.
Claim 12
Dependent Claim
17 words
A photosensitive and thermosensitive composition as in claim 11 also comprising an activator-toning agent which is phthalimide.
Claim 13
Dependent Claim
24 words
A photosensitive and thermosensitive composition as in claim 11 also comprising a stabilizer precursor which is an azole thioether or a blocked azole thione.
Claim 14
Dependent Claim
61 words
A photosensitive and thermosensitive composition comprising: a. an oxidation-reduction image-forming combination comprising (i) an oxidizing agent comprising silver behenate and (ii) a reducing agent which is 2,2''-dihydroxy-1,1''-binaphthyl, b. photosensitive silver halide, c. a divalent metal salt image amplifier which is zinc acetate, d. polyvinyl butyral binder, e. phthalimide activator-toning agent, f. an image-stabilizer precursor comprising 5-acetyl-4-methyl-2-(3-oxobutylthio)thiazole and g. a sensitizing dye.
Claim 15
Dependent Claim
14 words
A photosensitive and thermosensitive composition as in claim 11 also comprising a sensitizing dye.
Claim 16
Dependent Claim
66 words
A photosensitive and thermosensitive composition as in claim 11 comprising: a. about 0.10 mole to about 2.0 moles of said reducing agent per mole of said oxidizing agent, b. about 0.005 to about 0.50 mole of said catalyst per mole of said oxidizing agent and c. about 0.005 mole to about 0.20 mole of said zinc, copper or cadmium salt per mole of said oxidizing agent.
Claim 17
Independent Claim
74 words
A method of developing an image in an exposed photosensitive and thermosensitive element comprising a support having thereon an oxidation-reduction image-forming combination comprising (i) a heavy metal salt oxidizing agent with (ii) a reducing agent, a photosensitive silver salt catalyst for said oxidation-reduction image-forming combination, a binder and a divalent metal salt image amplifier which is a zinc, copper or cadmium salt, comprising heating said element to about 80* C to about 250* C.
Claim 18
Independent Claim
93 words
A method of developing and stabilizing an image in an exposed photosensitive and thermosensitive element comprising a support, a. an oxidation-reduction image-forming combination comprising (i) a silver salt oxidizing agent and (ii) a bis-beta-naphthol reducing agent, b. a catalyst for said oxidation-reduction image-forming combination comprising photosensitive silver halide, c. a divalent metal salt image amplifier which comprises zinc acetate, d. a binder, e. an activator-toning agent and f. an image-stabilizer precursor which is an azole thioether or a blocked azole thione, comprising heating said element to about 80* C. to about 250* C.
Claim 19
Independent Claim
86 words
A method of developing and stabilizing an image in an exposed photosensitive and thermosensitive element comprises a support, having thereon a. an oxidation-reduction image-forming combination comprising (i) an oxidizing agent comprising silver behenate and (ii) a reduciNg agent comprising 2,2''-dihydroxy-1,1''-binaphthyl, b. photosensitive silver halide, c. a divalent metal salt image amplifier which is zinc acetate, d. polyvinyl butyral binder, e. phthalimide activator-toning agent, f. an image-stabilizer precursor comprising 5-acetyl-4-methyl-2-(3-oxobutylthio)thiazole and g. a sensitizing dye, comprising heating said element to about 80* C. to about 250* C.
Claim 20
Dependent Claim
17 words
A method as in claim 20 comprising heating said element for about 0.5 to about 60 seconds.
Claim 21
Dependent Claim
28 words
A thermosensitive processing composition comprising: a. a silver salt oxidizing agent, b. a bis-beta-naphthol reducing agent, c. an activator-toning agent and d. a divalent metal salt image amplifier.
Claim 22
Dependent Claim
16 words
A thermosensitive processing composition comprising: a. silver behenate, b. 2,2''-dihydroxy-1,1''-binaphthyl, c. phthalimide and d. zinc acetate.
Claim 23
Dependent Claim
12 words
A thermosensitive processing composition as in claim 22 comprising polyvinyl butyral binder.
Claim 24
Dependent Claim
41 words
The photosensitive and thermosensitive element of claim 1 wherein said divalent metal salt image amplifier is present in a concentration of about 0.005 mole to about 0.20 mole of said divalent metal salt image amplifier per mole of said oxidizing agent.
Claim 25
Dependent Claim
41 words
The photosensitive and thermosensitive composition of claim 10 wherein said divalent metal salt image amplifier is present in a concentration of about 0.005 mole to about 0.20 mole of said divalent metal salt image amplifier per mole of said oxidizing agent.
Claim 26
Dependent Claim
38 words
The method of claim 18 wherein said divalent metal salt image amplifier is present in a concentration of about 0.005 mole to about 0.20 mole of said divalent metal salt image amplifier per mole of said oxidizing agent.
References Cited (Backward Citations)
US3094619A
Cited
US3457075A
Cited
US3322557A
Cited
US3523795A
Cited
US3460946A
Cited
GB1161777A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-02 | 1976-07-03 | 1977-01-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-02 | 1980-07-03 | 1981-01-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-02 | 1984-07-03 | 1985-01-02 | $7700.00 | Window Closed / Lapsed |