US4725532A
Expired / Lapsed
US
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Silver halide photographic light-sensitive material and high contrast negative image forming process using them
Assignee: Fujifilm Holdings Corp
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Filing: 1986-01-30
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Granted: 1988-02-16
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Expires: 2006-01-30
Abstract
Abstract A silver halide photographic light-sensitive material and high contrast negative image forming process using them are disclosed. The material comprises a support having thereon at least one silver halide emulsion layer in which said silver halide emulsion layer or other hydrophilic colloid layer contains at least one hydrazine derivative, at least one cationic dye selected from a cyanine dye, a hemicyanine dye and a rhodacyanine dye, and L-ascorbic acid, and has photographic characteristics of giving very high contrast of over 10 in γ, giving high practical Dmax and sensitivity, and causing less black peppers using a stable developer and having optimum spectral sensitivity for spectral energy distributions of various light sources.
Inventors
- 👤 Kimitaka Kameoka
- 👤 Junji Miyata
- 👤 Masaki Okazaki
- 👤 Senzo Sasaoka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:46
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/06; G03C1/08; G03C1/10; G03C1/12; G03C1/061; G03C1/127; G03C1/14; G03C1/16; G03C1/18; G03C1/26
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
188 words
The sliver halide photographic light-sensitive material comprising a support having thereon at least one silver halide emulsion layer in which said silver halide emulsion layer or other hydrophilic colloid layer contains at least one hydrazine derivative, at least one cationic dye selected from a cyanine dye, a hemicyanine dye and a rhodacyanine dye, and L-ascorbic acid, wherein the hydrazine derivative is a compound represented by the general formula (I) wherein, A represents an aliphatic group or an aromatic group; B represents a formyl group, an acyl group, an alkylsulfonyl group, an arylsulfonyl group, an alkylsulfinyl group, an arylsulfinyl group, a carbamoyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, a sulfinamoyl group, an alkoxysulfonyl group, a thioacyl group, a thiocarbamoyl group, or a heterocyclic group; and R 0 and R 1 both represent a hydrogen atom or one of them represents a hydrogen atom and the other represents a substituted or unsubstituted alkylsulfonyl group, a substituted or unsubstituted arylsulfonyl group, or a substituted or unsubstituted acyl group; said B, R 1 and the nitrogen atom to which they are bonded may form together a partial structure of hydrazone -N=C<.
Claim 2
Dependent Claim
188 words
The sliver halide photographic light-sensitive material comprising a support having thereon at least one silver halide emulsion layer in which said silver halide emulsion layer or other hydrophilic colloid layer contains at least one hydrazine derivative, at least one cationic dye selected from a cyanine dye, a hemicyanine dye and a rhodacyanine dye, and L-ascorbic acid, wherein the hydrazine derivative is a compound represented by the general formula (I) wherein, A represents an aliphatic group or an aromatic group; B represents a formyl group, an acyl group, an alkylsulfonyl group, an arylsulfonyl group, an alkylsulfinyl group, an arylsulfinyl group, a carbamoyl group, an alkoxycarbonyl group, an aryloxycarbonyl group, a sulfinamoyl group, an alkoxysulfonyl group, a thioacyl group, a thiocarbamoyl group, or a heterocyclic group; and R 0 and R 1 both represent a hydrogen atom or one of them represents a hydrogen atom and the other represents a substituted or unsubstituted alkylsulfonyl group, a substituted or unsubstituted arylsulfonyl group, or a substituted or unsubstituted acyl group; said B, R 1 and the nitrogen atom to which they are bonded may form together a partial structure of hydrazone -N=C<.
Claim 3
Dependent Claim
38 words
The silver halide photographic light-sensitive material as claimed in claim 1, wherein the content of the hydrazine derivative is 10 -6 mole to 1×10 -1 mole per mole of the silver halide in the silver halide emulsion layer.
Claim 4
Dependent Claim
117 words
The silver halide photographic light-sensitive material as claimed in claim 1, wherein the cyanine dye is a dye represented by the general formula (II) ##STR13## wherein, Z 1 and Z 2 , which may be the same or different, each represents an atomic group necessary for forming a 5- or 6-membered heterocyclic ring; R 1 and R 2 , which may be the same or different, each represents an alkyl group or a substituted alkyl group; L 1 , L 2 , and L 3 each represents a methine group or a substituted methine group; X 1 .sup.⊖ represents an anion; p and q each represents 0 or 1; and m represents 0, 1, 2 or 3.
Claim 5
Dependent Claim
147 words
The silver halide photographic light-sensitive material as claimed in claim 1, wherein the hemicyanine dye is a dye represented by the general formula (III) ##STR14## wherein Z 3 represents an atomic group necessary for forming a 5- or 6-membered heterocyclic ring; R 3 represents an alkyl group or a substituted alkyl group; L 4 , L 5 , L 6 , and L 7 each represents a methine group or a substituted methine group; X 2 .sup.⊖ represents an anion; G 1 and G 2 , which may be the same or different, each represents a hydrogen atom, an alkyl group, a substituted alkyl group, an aryl group, or a substituted aryl group, said G 1 and G 2 may form together a ring induced from a cyclic secondary amine; r represents 0 or 1; j represents 1 or 2; and n represents 0, 1 or 2.
Claim 6
Dependent Claim
157 words
The silver halide photographic light-sensitive material as claimed claim 1, wherein the rhodacyanine dye is a dye represented by the general formula (IV) ##STR15## wherein, Z 4 and Z 5 , which may be the same or different, each represents a 5- or 6-membered heterocyclic ring; R 4 and R 5 , which may be the same or different, each represents an alkyl group or a substituted alkyl group; R 6 represents a hydrogen atom, an alkyl group, a substituted alkyl group, an aryl group, a substituted aryl group, or a heterocyclic group; L 8 , L 9 , L 10 , L 11 , and L 12 each represents a methine group or a substituted methine group; W 1 represents an atomic group necessary for forming a 5- or 6-membered ring; X 2 .sup.⊖ represents an anion; h and l each represents 0, 1, 2 or 3; and s and t each represents 0 or 1.
Claim 7
Dependent Claim
37 words
The silver halide photographic light-sensitive material as claimed in claim 1, wherein the content of the cationic dye is 1×10 -7 to 10 -2 mole per mole of the silver halide in the silver halide emulsion layer.
Claim 8
Dependent Claim
32 words
The silver halide photographic light-sensitive material as claimed in claim 1, wherein the amount of L-ascorbic acid in the silver halide emulsion layer is 1 mg/m 2 to 500 mg/m 2 .
Claim 9
Dependent Claim
90 words
A process of forming high-contrast negative images, which comprises image-exposing a silver halide photographic light-sensitive material of claim 1 comprising a support having thereon at least one silver halide emulsion layer in which said silver halide emulsion layer or other hydrophilic colloid layer contains a hydrazine derivative, at least one cationic dye selected from a cyanine dye, a hemicyanine dye and a rhodacyanine dye, and L-ascorbic acid and then developing it with a developer containing a sulfite ion of at least 0.15 mole/liter and having pH of 10.5 to 12.3.
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) | 1991-02-15 | 1991-08-17 | 1992-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-02-15 | 1995-08-17 | 1996-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-02-15 | 1999-08-17 | 2000-02-16 | $7700.00 | Window Closed / Lapsed |