EP0097502A2
Expired / Lapsed
EP
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Support for lithographic printing plate and method for preparation thereof
Assignee: Konica Minolta Inc
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Filing: 1983-06-17
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Granted: —
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Expires: 2003-06-17
Abstract
Abstract A support for lithographic printing plate having provided on an iron material i) a layer substantially consisting of chromium and/or chromium oxide and ii) a layer containing a water soluble polymeric compound and at least one selected from water soluble salts of calcium, magnesium, zinc, barium, strontium, cobalt, manganese, nickel and silicon, in this order; and a method for preparation thereof.
Inventors
- 👤 Akio Iwaki
- 👤 Norihito Suzuki
- 👤 Takeshi Yamamoto
- 👤 Toru Aoki
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 18:41
CPC Classifications
B; B41; B41N; B41N3/00; B41N3/03; B41N3/038; B41N3/036; B41C; B41C1/00; B41C1/10; B41C1/1008; B41C2201/00; B41C2201/04; B41C2210/00; B41C2210/02; B41C2210/04; B41C2210/06; B41C2210/20; B41C2210/24; Y; Y10; Y10T; Y10T428/00; Y10T428/12; Y10T428/12493; Y10T428/12535; Y10T428/12542; Y10T428/12549; Y10T428/12556; Y10T428/12569; Y10T428/12583; Y10T428/1259; Y10T428/12771; Y10T428/12806; Y10T428/12826; Y10T428/12847; Y10T428/12854
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
55 words
A support for lithographic printing plate having provided on an iron material i) a layer substantially consisting of chromium and/or chromium oxide and ii) a layer containing a water soluble polymeric compound and at least one selected from water soluble salts of calcium, magnesium, zinc, barium, strontium, cobalt, manganese, nickel and silicon, in this order.
Claim 2
Dependent Claim
55 words
A support for lithographic printing plate having provided on an iron material i) a layer substantially consisting of chromium and/or chromium oxide and ii) a layer containing a water soluble polymeric compound and at least one selected from water soluble salts of calcium, magnesium, zinc, barium, strontium, cobalt, manganese, nickel and silicon, in this order.
Claim 3
Dependent Claim
19 words
The support for lithographic printing plate according to Claim 1, wherein the layer i) is an electrodeposited chromium layer.
Claim 4
Dependent Claim
20 words
The support for lithographic printing plate according to Claim 1, wherein a surface shape of the layer i) has concavo-convexes
Claim 5
Dependent Claim
36 words
The support for lithographic printing plate according to Claim 1, wherein the water soluble polymeric compound is at least one selected from a natural polymeric compound, a synthetic polymeric compound and a water soluble cellulose compound.
Claim 6
Dependent Claim
22 words
The support for lithographic printing plate according to Claim 1, wherein the water soluble salt is a salt of an organic acid.
Claim 7
Dependent Claim
26 words
The support for lithographic printing plate according to Claim 1, wherein the salt is at least one selected from salts with calcium, magnesium, barium and zinc.
Claim 8
Dependent Claim
26 words
The support for lithographic printing plate according to Claim 1, wherein the layer ii) is in an amount of from 0.001 to lmg/dm 2 after dried
Claim 9
Dependent Claim
31 words
The support for lithographic printing plate according to Claim 1, wherein said water soluble salt and said water soluble polymeric compound have solubility of 0.01 wt% or higher, respectively, in water.
Claim 10
Dependent Claim
31 words
The support for lithographic printing plate according to Claim 4, wherein said natural polymeric compound is one selected from the group consisting of gum arabic, starch, dextrin, sodium alginate and gelatin.
Claim 11
Dependent Claim
29 words
The support for lithographic printing plate according to Claim 4, wherein said water soluble cellulose compound is one selected from the gropup consisting of carboxyalkyl cellulose and alkyl cellulose.
Claim 12
Dependent Claim
27 words
The support for lithographic printing plate according to Claim 4, wherein the water soluble polymeric compound is a natural polymeric compound or a water soluble cellulose compound.
Claim 13
Dependent Claim
23 words
The support for lithographic printing plate according to Claim 1, wherein said water soluble polymeric compound has molecular weight of 1000 to 500,000.
Claim 14
Dependent Claim
21 words
The support for lithographic printing plate according to Claim 5, wherein the organic acid has from 2 to 28 carbon atoms.
Claim 15
Independent Claim
75 words
A method for preparing a support for lithographic printing plate as claimed in any one of claims 1 to 13, which comprises treating the surface of a layer i) substantially consisting of chromium and/or chromium oxide provided on an iron material, with a solution containing a water soluble polymeric compound and at least one selected from water soluble salts of calcium, magnesium, zinc, barium, strontium, cobalt, manganese, nickel and silicon to form a layer ii).
References Cited (Backward Citations)
No citation records indexed.
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