US4525449A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of treatment of color photographic materials
Assignee: Fujifilm Holdings Corp
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Filing: 1983-11-01
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Granted: 1985-06-25
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Expires: 2003-11-01
Abstract
Abstract A method of color reversal treatment of an exposed silver halide photographic material is disclosed. The method involves treating the exposed material with 2 both type black-and-white developing solutions. The first solution contains a compound represented by the general formula (I): R.sub.2 --S--R.sub.1).sub.d --S--R.sub.2 (I) wherein R 1 represents an alkylene group having 2 to 10 carbon atoms, which may have ether bonds, R 2 represents an alkyl group having 2 to 10 carbon atoms which alkyl group may have substituents, ether bonds or ester bonds, and d represents an integer of 0 to 3. The second black-and-white developing solution is a conventional solution. By utilizing the two solutions and specifically the first solution containing the compound of general formula (I) it is possible to obtain good photographic images having a high maximum density and good color balance. Further, images having different sensitivities can be obtained with the identical photographic materials when the conditions are varied.
Inventors
- 👤 Junya Nakajima
- 👤 Kiyoshi Imai
- 👤 Takashi Nakamura
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 03:48
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/305; G03C5/50
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
115 words
A method of color reversal treatment of an image-wise exposed silver halide color photographic material, comprising the steps of: treating the material in a first black-and-white developing solution containing a developer and a compound represented by the following general formula (I): R.sub.2 --S--R.sub.1).sub.d --S--R.sub.2 (I) wherein R 1 represents an alkylene group having 2 to 10 carbon atoms, which may have ether bonds, R 2 represents an alkyl group having 2 to 10 carbon atoms, which alkyl group may have substituents or may have ether bonds or ester bonds, and d represents an integer of 0 to 3 and treating the material in a second black-and-white developing solution and fogging and color developing the material.
Claim 2
Independent Claim
115 words
A method of color reversal treatment of an image-wise exposed silver halide color photographic material, comprising the steps of: treating the material in a first black-and-white developing solution containing a developer and a compound represented by the following general formula (I): R.sub.2 --S--R.sub.1).sub.d --S--R.sub.2 (I) wherein R 1 represents an alkylene group having 2 to 10 carbon atoms, which may have ether bonds, R 2 represents an alkyl group having 2 to 10 carbon atoms, which alkyl group may have substituents or may have ether bonds or ester bonds, and d represents an integer of 0 to 3 and treating the material in a second black-and-white developing solution and fogging and color developing the material.
Claim 3
Dependent Claim
51 words
A method as claimed in claim 1, wherein R 1 is an alkylene group having ether bonds, the alkylene group having the general formula --C n H 2n --(OC n H 2n ) m --wherein the total number of carbon atoms is 2 to 10 and m is 1 to 2.
Claim 4
Dependent Claim
24 words
A method as claimed in claim 1, wherein R 2 is an alkyl group having a hydroxy group or carboxyl group substituent positioned thereon.
Claim 5
Dependent Claim
20 words
A method as claimed in claim 3, wherein the R 2 alkyl group has a hydroxy group substituent positioned thereon.
Claim 6
Dependent Claim
34 words
A method as claimed in claim 1, wherein the R 1 and R 2 each represents alkylene groups containing 2 to 5 carbon atoms and a hydroxyalkyl group having 2 to 5 carbon atoms.
Claim 7
Dependent Claim
22 words
A method as claimed in claim 1, wherein the compound of general formula (I) is the compound: HO(CH.sub.2).sub.2 S(CH.sub.2).sub.2 S(CH.sub.2).sub.2 S(CH.sub.2).sub.2 OH
Claim 8
Dependent Claim
21 words
A method as claimed in claim 1, wherein the compound of general formula (I) is the compound: HO(CH.sub.2).sub.2 S(CH.sub.2).sub.2 S(CH.sub.2).sub.2 OH
Claim 9
Dependent Claim
21 words
A method as claimed in claim 1, wherein the compound of general formula (I) is the compound: HO(CH.sub.2).sub.3 S(CH.sub.2).sub.2 S(CH.sub.2).sub.3 OH
Claim 10
Dependent Claim
21 words
A method as claimed in claim 1, wherein the compound of general formula (I) is the compound: HO(CH.sub.2).sub.2 S(CH.sub.2).sub.3 S(CH.sub.2).sub.2 OH
Claim 11
Dependent Claim
41 words
A method as claimed in claim 1, wherein the compound of general formula (I) is present in the first black-and-white developing solution in an amount in the range of 0.001 to 100 g per liter of the first black-and-white developing solution.
Claim 12
Dependent Claim
35 words
A method as claimed in claim 10, wherein the compound of general formula (I) is present in an amount in the range of 0.03 to 30 g per liter of the first black-and-white developing solution.
Claim 13
Dependent Claim
31 words
A method as claimed in claim 1, wherein the temperature of the first black-and-white developing solution and the second black-and-white developing solution is in the range of 10° to 60° C.
Claim 14
Dependent Claim
31 words
A method as claimed in claim 12, wherein the temperature of the first black-and-white developing solution and the second black-and-white developing solution is in the range of 20° to 50° C.
Claim 15
Dependent Claim
30 words
A method as claimed in claim 13, wherein the first black-and-white developing solution and the second black-and-white developing solution have a temperature in the range of 30° to 40° C.
Claim 16
Dependent Claim
54 words
A method as claimed in claim 1, wherein the treating in the first black-and-white developing solution is carried out for a period of time in the range of 1 to 20 minutes and the treating in the second black-and-white developing solution is carried out over a period of time of 10 minutes or less.
Claim 17
Dependent Claim
32 words
A method as claimed in claim 15, wherein the treating in the first black-and-white developing solution is carried out over a period of time in the range of 2 to 15 minutes.
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) | 1988-06-24 | 1988-12-24 | 1989-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-06-24 | 1992-12-24 | 1993-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-06-24 | 1996-12-24 | 1997-06-25 | $7700.00 | Window Closed / Lapsed |