US4948699A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Silver halide photographic light sensitive material and light sensitive lithographic printing plate material
Assignee: Mitsubishi Paper Mills Ltd
•
Filing: 1988-08-01
•
Granted: 1990-08-14
•
Expires: 2008-08-01
Abstract
Abstract This invention provides a silver halide photographic light sensitive material and a light sensitive lithographic printing plate material which are enhanced in sensitivity to semiconductor laser beam and improved in storage stability and printing endurance. The former comprises a support and a silver halide emulsion layer containing a sensitizing dye having a spectral sensitivity maximum in a wavelength region longer than 700 nm wherein said emulsion layer contains a water-soluble polymer containing a carboxyl group and having a number-average molecular weight of 20,000 or less and the latter comprises a support and, provided thereon, a silver halide emulsion layer containing a sensitizing dye having a spectral sensitivity maximum in a wavelength region longer than 700 nm and a physical development nuclei layer and said emulsion layer contains the above mentioned water-soluble polymer.
Inventors
- 👤 Hiroshi Nishinoiri
- 👤 Toshiro Kondo
- 👤 Yoshikazu Takaya
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:02
CPC Classifications
G; G03; G03F; G03F7/00; G03F7/004; G03F7/06; G03C; G03C1/00; G03C1/005; G03C1/04; G03C1/053; G03C1/06; G03C1/08; G03C1/10; G03C1/12; Y; Y10; Y10S; Y10S430/00; Y10S430/145
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
110 words
A silver halide photographic light sensitive material which comprises a support and a silver halide emulsion layer containing a sensitizing dye having a spectral sensitivity maximum in a wavelength region longer than 700 nm wherein said emulsion layer contains a water-soluble polymer which is a homopolymer of an olefinic unsaturated compound containing a carboxyl group, or a salt or an acid anhydride thereof, as a monomer unit or a copolymer of an olefinic unsaturated compound containing a carboxyl group, or a salt or an acid anhydride thereof, as a monomer unit with a vinyl monomer copolymerizable therewith, and the water-soluble polymer has a number-average molecular weight of 20,000 or less.
Claim 2
Dependent Claim
110 words
A silver halide photographic light sensitive material which comprises a support and a silver halide emulsion layer containing a sensitizing dye having a spectral sensitivity maximum in a wavelength region longer than 700 nm wherein said emulsion layer contains a water-soluble polymer which is a homopolymer of an olefinic unsaturated compound containing a carboxyl group, or a salt or an acid anhydride thereof, as a monomer unit or a copolymer of an olefinic unsaturated compound containing a carboxyl group, or a salt or an acid anhydride thereof, as a monomer unit with a vinyl monomer copolymerizable therewith, and the water-soluble polymer has a number-average molecular weight of 20,000 or less.
Claim 3
Dependent Claim
29 words
A light sensitive material according to claim 1 wherein content of the olefinic unsaturated compound containing a carboxyl group in the copolymer is at least about 10% by weight.
Claim 4
Dependent Claim
19 words
A light sensitive material according to claim 1 wherein the water-soluble polymer has a number-average molecular weight of 1,000-10,000.
Claim 5
Dependent Claim
214 words
A light sensitive material according to claim 1 wherein the sensitizing dye is at least one dye represented by the following formulas (I)-(IV): ##STR4## wherein Z 1 and Z 2 which may be identical or different each represents group of atoms necessary to form 5-membered or 6-membered nitrogen-containing heterocyclic ring; R 1 and R 2 which may be identical or different each represents an alkyl group or an alkenyl group; R 3 represents an alkyl group, an alkenyl group or an aryl group; R 4 -R 10 which may be identical or different each represents a hydrogen atom, a halogen atom, an alkyl group, an aryl group or an alkoxy group and R 6 and R 7 or R 8 and R 9 may link to each other to form a 5-membered or 6-membered ring; R 11 and R 12 which may be identical or different each represents an alkyl group or an aryl group and may link to each other to form a 5-membered or 6-membered ring; Y represents a sulfur atom, an oxygen atom, >N-R 13 (R 13 is an alkyl group), X represents an acid anion; l, m, n, p and q each represents 1 or 2; and Q represents a group of atoms necessary to form 5-membered or 6-membered ring.
Claim 6
Dependent Claim
26 words
A light sensitive material according to claim 1 wherein amount of the sensitizing dye is 1×10 -6 -1×10 -3 mol for 1 mol of silver halide.
Claim 7
Dependent Claim
25 words
A method for image formation which comprises imagewise exposing the light sensitive material according to claim 1 with a semiconductor laser beam and developing it.
Claim 8
Dependent Claim
124 words
A light sensitive lithographic printing plate material which comprises a support and, provided thereon, a silver halide emulsion layer containing a sensitizing dye having a spectral sensitivity maximum in a wavelength region longer than 700 nm and a physical development nuclei layer which is an outermost surface layer wherein such emulsion layer contains a water-soluble polymer which is a homopolymer of an olefinic unsaturated compound containing a carboxyl group, or a salt or an acid anhydride thereof, as a monomer unit or a copolymer of an olefinic unsaturated compound containing a carboxyl group, or a salt or an acid anhydride thereof, as a monomer unit with a vinyl monomer copolymerizable therewith, and the water-soluble polymer has a number-average molecular weight of 20,000 or less.
Claim 9
Dependent Claim
124 words
A light sensitive lithographic printing plate material which comprises a support and, provided thereon, a silver halide emulsion layer containing a sensitizing dye having a spectral sensitivity maximum in a wavelength region longer than 700 nm and a physical development nuclei layer which is an outermost surface layer wherein such emulsion layer contains a water-soluble polymer which is a homopolymer of an olefinic unsaturated compound containing a carboxyl group, or a salt or an acid anhydride thereof, as a monomer unit or a copolymer of an olefinic unsaturated compound containing a carboxyl group, or a salt or an acid anhydride thereof, as a monomer unit with a vinyl monomer copolymerizable therewith, and the water-soluble polymer has a number-average molecular weight of 20,000 or less.
Claim 10
Dependent Claim
28 words
A light sensitive lithographic printing plate material according to claim 7 which substantially have at least one of subbing layer and an undercoat layer under the emulsion layer.
Claim 11
Dependent Claim
44 words
A method of plate making which comprises imagewise exposing the light sensitive material according to claim 7 with a semiconductor laser beam and developing it with a developer containing a silver halide complexing agent to produce a silver image on the surface nuclei layer.
Claim 12
Dependent Claim
36 words
A method of printing which comprises mounting the printing plate made by the method according to claim 9, applying a printing ink on the silver image produced on the surface nuclei layer and carrying out printing.
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) | 1993-08-13 | 1994-02-12 | 1994-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-08-13 | 1998-02-12 | 1998-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-08-13 | 2002-02-12 | 2002-08-14 | $7700.00 | Window Closed / Lapsed |