Claims
- 1. A heat-sensitive material for making lithographic printing plates comprising on a lithographic support an image-forming layer comprising a hydrophilic binder, a cross-linking agent for said hydrophilic binder, metal oxide particles with a mean diameter of at least 100 nm and dispersed hydrophobic thermoplastic polymer particles, characterized in that said image-forming layer has a ratio of specific surface (in m2 per g) over mean roughness (in μm) of more than 0.65 and has a mean pore width of less than 15 nm.
- 2. A heat-sensitive material according to claim 1 wherein said ratio of specific surface over mean roughness is more than 0.85.
- 3. A heat-sensitive material according to claim 1 wherein said mean pore width is less than 7 nm.
- 4. A heat-sensitive material according to claim 1 wherein said metal oxide particle is titanium dioxide.
- 5. A heat-sensitive material according to claim 1 wherein said heat-sensitive material comprises a compound capable of converting light into heat.
- 6. A heat-sensitive material according to claim 5 wherein said compound capable of converting light into heat is an IR sensitive dye or pigment.
- 7. A heat-sensitive material according to claim 1 wherein said image forming layer is present in an amount ranging from 1 to 12 g/m2.
- 8. A method for making a lithographic printing plate comprising the step of image-wise exposing to heat a heat-sensitive material according to claim 1 thereby resulting in an increase in hydrophilicity and oleophilicity of the exposed areas without loss of hydrophilicity non-imaged parts.
- 9. A method for making lithographic printing plate according to claim 8 wherein an image is formed by direct thermal recording.
- 10. A method for making lithographic printing plates according to claim 8 wherein the heat-sensitive material is mounted on a printing press.
Priority Claims (1)
Number |
Date |
Country |
Kind |
98202576 |
Jul 1998 |
EP |
|
Parent Case Info
This application is based on provisional application Serial No. 60/101,033 filed Sept. 18, 1998.
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Foreign Referenced Citations (1)
Number |
Date |
Country |
0 770 494 |
May 1997 |
EP |
Non-Patent Literature Citations (1)
Entry |
Research Disclosure: “A Lithographic Printing Plate”, No. 333, Jan. 1, 1992, p. 2, XP0000281114. |
Provisional Applications (1)
|
Number |
Date |
Country |
|
60/101033 |
Sep 1998 |
US |