Support for lithographic printing plate and presensitized plate and method of producing lithographic printing plate

• US 20050074687A1
• Filed: 03/21/2003
• Published: 04/07/2005
• Est. Priority Date: 03/26/2002
• Status: Active Grant

• Current Assignee: Fujifilm Corporation (Fujifilm Holdings Corporation)
• Original Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Inventors: Hotta, Hisashi, Matsuki, Masaya
• Granted Patent: US 7,063,935 B2
• Time in Patent Office: Days
• US Class Current: 430/270.100
• CPC Class Codes: B41C 1/1008 by removal or destruction of lithographic material on the lithographic support, e.g. by laser or spark ablation; by the use of materials rendered soluble or insoluble by heat exposure, e.g. by heat produced from a light to heat transforming system; by on-the-press exposure or on-the-press development, e.g. by the fountain of photolithographic materials
• CPC Class Codes: B41C 1/1016 characterised by structural details, e.g. protective layers, backcoat layers or several imaging layers
• CPC Class Codes: B41C 2201/04 Intermediate layers
• CPC Class Codes: B41C 2201/12 characterised by non-macromolecular organic compounds
• CPC Class Codes: B41C 2201/14 characterised by macromolecular organic compounds, e.g. binder, adhesives
• CPC Class Codes: B41C 2210/02 Positive working, i.e. the exposed (imaged) areas are removed
• CPC Class Codes: B41C 2210/04 Negative working, i.e. the non-exposed (non-imaged) areas are removed
• CPC Class Codes: B41C 2210/06 Developable by an alkaline solution
• CPC Class Codes: B41C 2210/22 characterised by organic non-macromolecular additives, e.g. dyes, UV-absorbers, plasticisers
• CPC Class Codes: B41C 2210/24 characterised by a macromolecular compound or binder obtained by reactions involving carbon-to-carbon unsaturated bonds, e.g. acrylics, vinyl polymers
• CPC Class Codes: B41N 1/08 for lithographic printing B41N1/003, B41N3/03 take precedence; compositions of the image-forming layer B41C1/10
• CPC Class Codes: B41N 3/038 Treatment with a chromium compound, a silicon compound, a phophorus compound or a compound of a metal of group IVB; Hydrophilic coatings obtained by hydrolysis of organometallic compounds
• CPC Class Codes: Y10T 428/12104 Particles discontinuous
• CPC Class Codes: Y10T 428/12736 Al-base component

Abstract

Disclosed is a support for a lithographic printing plate, wherein an adhering amount of a rare-earth element atom to a surface thereof is 0.1 to 20 mg/mg², and a presensitized plate provided with an image recording layer on the support for a lithographic printing plate. The presensitized plate achieving both high scum resistance and long press life can be realized, which is the same in the case the image recording layer containing an infrared absorbent, where scum would easily occur, is provided onto the support.

Claims

1. A support for a lithographic printing plate, wherein an adhering amount of a rare-earth element atom to a surface thereof is 0.1 to 20 mg/m².

2. The support for a lithographic printing plate according to claim 1 obtainable by sequentially performing a hydrophilic treatment and a treatment with a liquid containing a rare-earth element ion on an aluminum plate after at least an anodizing treatment is performed thereon.

3. The support for a lithographic printing plate according to claim 2, wherein the hydrophilic treatment is a treatment with an alkali metal silicate aqueous solution.

5. A presensitized plate provided with an image recording layer on the support for a lithographic printing plate according to claim 1.

6. A presensitized plate provided with an image recording layer on the support for a lithographic printing plate according to claim 2.

7. A presensitized plate provided with an image recording layer on the support for a lithographic printing plate according to claim 3.

9. The presensitized plate according to claim 5, wherein the image recording layer is an image recording layer containing an infrared absorbent.

10. The presensitized plate according to claim 6, wherein the image recording layer is an image recording layer containing an infrared absorbent.

11. The presensitized plate according to claim 7, wherein the image recording layer is an image recording layer containing an infrared absorbent.

13. The presensitized plate according to claim 5, wherein there is provided an intermediate layer containing a high-molecular compound having a constituent with an acid group and a constituent with an onium group between the support for a lithographic printing plate and the image recording layer.

14. The presensitized plate according to claim 6, wherein there is provided an intermediate layer containing a high-molecular compound having a constituent with an acid group and a constituent with an onium group between the support for a lithographic printing plate and the image recording layer.

15. The presensitized plate according to claim 7, wherein there is provided an intermediate layer containing a high-molecular compound having a constituent with an acid group and a constituent with an onium group between the support for a lithographic printing plate and the image recording layer.

17. A method for producing a lithographic printing plate by performing a development using a developer containing substantially no alkali metal silicates after an exposure is performed on the presensitized plate according to claim 5 to obtain a lithographic printing plate.

18. A method for producing a lithographic printing plate by performing a development using a developer containing substantially no alkali metal silicates after an exposure is performed on the presensitized plate according to claim 6 to obtain a lithographic printing plate.

19. A method for producing a lithographic printing plate by performing a development using a developer containing substantially no alkali metal silicates after an exposure is performed on the presensitized plate according to claim 7 to obtain a lithographic printing plate.

4. A support for a lithographic printing plate obtainable by a following manner that a hydrophilic treatment is performed on an aluminum plate with an alkali metal silicate aqueous solution with a concentration of 0.6 to 5.0 wt % after at least a graining treatment and an anodizing treatment are performed thereon and a treatment is further performed thereon with an aqueous solution containing a carboxylic acid and/or a carboxylate of an element in the third to the 7th groups and the 13th to the 16th groups of the periodic table.

8. A presensitized plate provided with an image recording layer on the support for a lithographic printing plate according to claim 4.

12. The presensitized plate according to claim 8, wherein the image recording layer is an image recording layer containing an infrared absorbent.

16. The presensitized plate according to claim 8, wherein there is provided an intermediate layer containing a high-molecular compound having a constituent with an acid group and a constituent with an onium group between the support for a lithographic printing plate and the image recording layer.

20. A method for producing a lithographic printing plate by performing a development using a developer containing substantially no alkali metal silicates after an exposure is performed on the presensitized plate according to claim 8 to obtain a lithographic printing plate.