US4828968A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of developing photographic light-sensitive materials
Assignee: Fujifilm Holdings Corp
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Filing: 1986-10-15
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Granted: 1989-05-09
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Expires: 2006-10-15
Abstract
Abstract Silver halide photographic light-sensitive materials containing a hydrazine derivative is developed in high contrast by means of an automatic processor, wherein a replenisher less active than a starting developer used at the beginning of development is supplied in a predetermined amount per unit time and, in the case where further replenishment is done in excess of said predetermined amount in said unit time, a replenisher having activity substantially equivalent to that of said starting developer used at the beginning of development is then supplied. Stable treatment results are attained for a long time.
Inventors
- 👤 Eiichi Okutsu
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:03
CPC Classifications
G; G03; G03C; G03C5/00; G03C5/26; G03C5/29; G03C5/31
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
141 words
A method of high-contrast developing of an image-wise exposed silver halide photographic light-sensitive material containing a hydrazine derivative, said process comprising (i) developing said material with a developing solution in an automatic processor, (ii) supplying a first replenisher to a developing bath of the processor in an amount based on time, and (iii) supplying a second replenisher if the amount of necessary replenisher exceeds that of the first replenisher, wherein said first replenisher has an activity such that it requires a longer time to obtain the same optical density in the treatment of the image-wise exposed material than the time which would be required of the developing solution at the beginning of development at the same temperature, and wherein the second replenisher has an activity which is substantially the same as that of the developing solution at the beginning of development.
Claim 2
Independent Claim
141 words
A method of high-contrast developing of an image-wise exposed silver halide photographic light-sensitive material containing a hydrazine derivative, said process comprising (i) developing said material with a developing solution in an automatic processor, (ii) supplying a first replenisher to a developing bath of the processor in an amount based on time, and (iii) supplying a second replenisher if the amount of necessary replenisher exceeds that of the first replenisher, wherein said first replenisher has an activity such that it requires a longer time to obtain the same optical density in the treatment of the image-wise exposed material than the time which would be required of the developing solution at the beginning of development at the same temperature, and wherein the second replenisher has an activity which is substantially the same as that of the developing solution at the beginning of development.
Claim 3
Dependent Claim
74 words
The method of claim 1, wherein said first replenisher is selected from the group consisting of a liquid having a pH lower than that of the starting developing solution, a liquid obtained by diluting the starting developing solution with water, a liquid containing an antifoggant in an amount larger than that in the starting developing solution and a liquid containing a developing agent in an amount smaller than that of the starting developing solution.
Claim 4
Dependent Claim
26 words
The method of claim 1, wherein said first replenisher is a liquid having a pH lower than that of the starting developer by 0.05 to 0.2.
Claim 5
Dependent Claim
32 words
The method of claim 1, wherein said first replenisher is a liquid obtained by diluting the starting developer with water at a ratio of water/the starting developing solution of 0.05 to 0.2.
Claim 6
Dependent Claim
16 words
The method of claim 1, wherein the first replenisher solution is added for about 24 hours.
Claim 7
Dependent Claim
26 words
The method of claim 1, wherein the developing solution contains a dihydroxybenzene compound as a developing agent in an amount of 0.05 mole/l to 0.8 mole/l.
Claim 8
Dependent Claim
11 words
The method of claim 6, wherein said dihydroxybenzene compound is hydroquinone.
Claim 9
Dependent Claim
30 words
The method of claim 6, wherein said starting developer contains a p-aminophenol compound or a 3-pyrazolidone compound as an auxiliary developing agent in an amount of 0.06 mole/l or less.
Claim 10
Dependent Claim
11 words
The method of claim 8, wherein said P-aminophenol compound is N-methyl-P-aminophenol.
Claim 11
Dependent Claim
16 words
The method of claim 1, wherein the developing solution has a pH of 10.5 to 12.3.
Claim 12
Dependent Claim
117 words
The method of claim 1, wherein said hydrazine derivative is a compound represented by the formula (I): ##STR4## wherein A represents an aliphatic or aromatic group; B represents a formyl, acyl, alkyl- or arylsulfonyl, alkyl- or arylsulfinyl, carbamoyl, alkoxy- or aryloxycarbonyl, sulfinamoyl, alkoxysulfonyl, thioacyl, thiocarbamoyl or heterocyclic group; and R 0 and R 1 both represent a hydrogen atom or either one of R 0 and R 1 represents a hydrogen atom and the other one represents a substituted or unsubstituted alkylsulfonyl, substituted or unsubstituted arylsulfonyl, or substituted or unsubstituted acyl group, provided that B, R 1 and a nitrogen atom to which B and R 1 are bound may form a partial structure of hydrazine, --N═C<.
References Cited (Backward Citations)
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-05-08 | 1992-11-07 | 1993-05-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-05-08 | 1996-11-07 | 1997-05-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-05-08 | 2000-11-07 | 2001-05-09 | $7700.00 | Window Closed / Lapsed |