US4481285A
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Method of treating direct positive silver halide sensitive material
Assignee: Fujifilm Holdings Corp
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Filing: 1983-04-14
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Granted: 1984-11-06
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Expires: 2003-04-14
Abstract
Abstract A method of treating a direct positive silver halide sensitive material is disclosed. The material is comprised of a base having thereon a compound represented by the general formula (I), a sensitive silver halide photographic emulsion layer and a hydrophilic colloid layer. The exposed material is developed in the presence of the compound represented by the general formula (II) ##STR1## wherein R 1 and R 2 independently represent a hydrogen atom, an aliphatic residue, an aromatic residue or a heterocyclic residue, R 3 represents a hydrogen atom or an aliphatic residue, R 4 represents a hydrogen atom, an aliphatic residue or an aromatic residue, and X represents a divalent aromatic residue; ##STR2## wherein R 1 and R 2 represent each a hydrogen atom or an aliphatic residue, and R 1 and R 2 may form a ring by linking together, R 3 represents a divalent aliphatic residue, X represents a single bond or a divalent heterocyclic ring containing nitrogen, oxygen or sulfur atoms, and M represents a hydrogen atom, an alkali metal, an alkaline earth metal, a quaternary ammonium salt, a quaternary phosphonium salt or an amidino group. The invention provides a process wherein the sharpness and edge effects of direct positive images are greatly improved. The results obtained with the process do not vary due to changes in the bromine ion concentration in the developing solution or the pH thereof.
Inventors
- 👤 Yoshihiro Takagi
- 👤 Shigeo Hirano
- 👤 Tadao Sugimoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:14
CPC Classifications
G; G03; G03C; G03C1/00; G03C1/005; G03C1/485; G03C1/48538; G03C1/48546; G03C1/48561; Y; Y10; Y10S; Y10S430/00; Y10S430/141
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
239 words
A method of treating a photographic material for forming a direct positive image, comprising the steps of: providing a direct positive silver halide sensitive material which has been imagewise exposed to light and comprising a base having thereon a fogging compound represented by the general formula (I), an inner latent image type sensitive silver halide photographic emulsion layer which is not previously fogged, and a hydrophilic colloid layer; and developing the material in the presence of a compound represented by the general formula (II): ##STR11## wherein R 1 and R 2 independently represent a hydrogen atom, an aliphatic residue, an aromatic residue or a heterocyclic residue, R 3 represents a hydrogen atom or an aliphatic residue, R 4 represents a hydrogen atom, an aliphatic residue or an aromatic residue, and X represents a divalent aromatic residue; ##STR12## wherein R 1 and R 2 represent each a hydrogen atom or an aliphatic residue, and R 1 and R 2 may form a ring by linking together, R 3 represents a divalent aliphatic residue, X represents a single bond or a divalent heterocyclic ring containing one or more nitrogen, oxygen or sulfur atoms, and M represents a hydrogen atom, an alkali metal, an alkaline earth metal, a quaternary ammonium group, a quaternary phosphonium group or an amidino group said compound represented by formula (II) is present in an amount sufficient to improve the sharpness and edge effect of said direct-positive image.
Claim 2
Independent Claim
239 words
A method of treating a photographic material for forming a direct positive image, comprising the steps of: providing a direct positive silver halide sensitive material which has been imagewise exposed to light and comprising a base having thereon a fogging compound represented by the general formula (I), an inner latent image type sensitive silver halide photographic emulsion layer which is not previously fogged, and a hydrophilic colloid layer; and developing the material in the presence of a compound represented by the general formula (II): ##STR11## wherein R 1 and R 2 independently represent a hydrogen atom, an aliphatic residue, an aromatic residue or a heterocyclic residue, R 3 represents a hydrogen atom or an aliphatic residue, R 4 represents a hydrogen atom, an aliphatic residue or an aromatic residue, and X represents a divalent aromatic residue; ##STR12## wherein R 1 and R 2 represent each a hydrogen atom or an aliphatic residue, and R 1 and R 2 may form a ring by linking together, R 3 represents a divalent aliphatic residue, X represents a single bond or a divalent heterocyclic ring containing one or more nitrogen, oxygen or sulfur atoms, and M represents a hydrogen atom, an alkali metal, an alkaline earth metal, a quaternary ammonium group, a quaternary phosphonium group or an amidino group said compound represented by formula (II) is present in an amount sufficient to improve the sharpness and edge effect of said direct-positive image.
Claim 3
Dependent Claim
22 words
A method of treatment is claimed in claim 1, wherein within compounds (I) one of R 1 or R 2 is hydrogen.
Claim 4
Dependent Claim
21 words
A method of treatment as claimed in claim 1, wherein within compound (I) R 4 is hydrogen or a methyl group.
Claim 5
Dependent Claim
17 words
A method of treatment as claimed in claim 3, wherein within compound (I) R 4 is hydrogen.
Claim 6
Dependent Claim
23 words
A method of treatment as claimed in claim 1, wherein the compound (I) is incorporated within the sensitive silver halide photographic emulsion layer.
Claim 7
Dependent Claim
20 words
A method of treatment as claimed in claim 1, wherein the compound (I) is contained within the hydrophilic colloid layer.
Claim 8
Dependent Claim
26 words
A method of treatment as claimed in claim 5, wherein the compound (I) is present in an amount of 0.1 mg to 5,000 mg/mol of silver.
Claim 9
Dependent Claim
22 words
A method of treatment as claimed in claim 1, wherein within the compound (II) R 1 and R 2 form a ring.
Claim 10
Dependent Claim
33 words
A method of treatment as claimed in claim 8, wherein the ring is a 5-member or 6-member carbocyclic or heterocyclic ring comprised of carbon atoms or carbon atoms and nitrogen or oxygen atoms.
Claim 11
Dependent Claim
14 words
A method of treatment as claimed in claim 9, wherein the ring is saturated.
Claim 12
Dependent Claim
27 words
A method of treatment as claimed in claim 1, wherein within compound (II) R 1 and R 2 represent alkyl groups containing 1 to 3 carbon atoms.
Claim 13
Dependent Claim
28 words
A method of treatment as claimed in claim 1, wherein the compound (II) is present in an amount of from 10 -8 to 10 -1 mol/mol of silver.
Claim 14
Dependent Claim
28 words
A method of treatment as claimed in claim 1, wherein the compound (II) is present in a processing solution in an amount of 1 mg/l to 100 mg/l.
Claim 15
Dependent Claim
227 words
A direct positive silver halide photosensitive material comprising a base having thereon a fogging compound represented by the general formula (I): ##STR13## wherein R 1 and R 2 independently represent a hydrogen atom, an aliphatic residue, an aromatic residue or a heterocyclic residue, R 3 represents a hydrogen atom or an aliphatic residue, R 4 represents a hydrogen atom, an aliphatic residue or an aromatic residue, and X represents a divalent aromatic residue; and a compound represented by the general formula (II): ##STR14## wherein R 1 and R 2 represent each a hydrogen atom or an aliphatic residue, and R 1 and R 2 may form a ring by linking together, R 3 represents a divalent aliphatic residue, X represents a single bond or a divalent heterocyclic ring containing one or more nitrogen, oxygen or sulfur atoms, and M represents a hydrogen atom, an alkali metal, an alkaline earth metal, a quaternary ammonium group, a quaternary phosphonium group or am amidino group, said compounds represented by the general formula (I) or (II) being present in an inner latent image type sensitive silver halide photographic emulsion layer which is not previously fogged or a hydrophilic colloid layer, said compound represented by formula (II) is present in an amount sufficient to improve the sharpness and edge effect of a direct-positive image formed by said direct-positive silver halide photosensitive material.
Claim 16
Dependent Claim
227 words
A direct positive silver halide photosensitive material comprising a base having thereon a fogging compound represented by the general formula (I): ##STR13## wherein R 1 and R 2 independently represent a hydrogen atom, an aliphatic residue, an aromatic residue or a heterocyclic residue, R 3 represents a hydrogen atom or an aliphatic residue, R 4 represents a hydrogen atom, an aliphatic residue or an aromatic residue, and X represents a divalent aromatic residue; and a compound represented by the general formula (II): ##STR14## wherein R 1 and R 2 represent each a hydrogen atom or an aliphatic residue, and R 1 and R 2 may form a ring by linking together, R 3 represents a divalent aliphatic residue, X represents a single bond or a divalent heterocyclic ring containing one or more nitrogen, oxygen or sulfur atoms, and M represents a hydrogen atom, an alkali metal, an alkaline earth metal, a quaternary ammonium group, a quaternary phosphonium group or am amidino group, said compounds represented by the general formula (I) or (II) being present in an inner latent image type sensitive silver halide photographic emulsion layer which is not previously fogged or a hydrophilic colloid layer, said compound represented by formula (II) is present in an amount sufficient to improve the sharpness and edge effect of a direct-positive image formed by said direct-positive silver halide photosensitive material.
Claim 17
Dependent Claim
29 words
A direct positive silver halide photosensitive material as claimed in claim 14, wherein the compound (I) is present in an amount of 0.1 mg to 5,000 mg/mol of silver.
Claim 18
Dependent Claim
31 words
A direct positive silver halide photosensitive material as claimed in claim 14, wherein the compound (II) is present in an amount of from 10 -8 to 10 -1 mol/mol of silver.
Claim 19
Dependent Claim
65 words
A direct positive silver halide photosensitive material as claimed in claim 14, wherein the compound represented by the general formula (I) is present in the silver halide photographic emulsion layer in an amount of 10 -8 to 10 -1 mol/mol of silver and the compound represented by the general formula (II) is present in an amount of 10 -8 to 10 -1 mol/mol of silver.
References Cited (Backward Citations)
US4110338A
Cited
US4374923A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-11-06 | 1988-05-07 | 1988-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-11-06 | 1992-05-07 | 1992-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-11-06 | 1996-05-07 | 1996-11-06 | $7700.00 | Window Closed / Lapsed |