Claims
- 1. A method for removing ink-accepting areas from a printing master by laser ablation, characterized in that the printing master comprises a substrate which comprises a support and a base layer, wherein the base layer contains a crosslinked hydrophilic binder and a metal oxide.
- 2. A method of lithographic printing with a reusable substrate by
(a) providing a substrate comprising a support and a base layer which contains a crosslinked hydrophilic binder and a metal oxide; (b) applying one or more layer(s) on the base layer, thereby obtaining an imaging material; (c) making a printing master having ink-accepting areas by image-wise exposure of the imaging material to heat or light and optionally processing the imaging material; (d) printing; (e) removing the ink-accepting areas from the printing master by laser ablation; and (f) repeating steps (a) through (d).
- 3. The method according to claim 2 wherein the imaging material contains an image-recording layer which comprises hydrophobic thermoplastic polymer particles or an aryldiazosulfonate polymer.
- 4. The method according to claim 2 wherein during step (e) ablation debris and/or fumes are removed by a vacuum device.
- 5. The method according to claim 2 wherein the laser is an infrared laser.
- 6. The method according to claim 2 wherein the laser is a pulsed laser.
- 7. The method according to claim 2 wherein the metal is Ti, Zr, Hf, or a mixture thereof.
- 8. The method according to claim 2 wherein the base layer further comprises a hydroxide of the metal.
- 9. The method according to claim 2 wherein the support is a plastic support, an aluminum support, or a laminate of a plastic and an aluminum support.
- 10. The method according to claim 9 wherein the aluminum support is a grained and anodized aluminum support.
Priority Claims (1)
Number |
Date |
Country |
Kind |
01000015.6 |
Feb 2001 |
EP |
|
CROSS-REFERENCE TO RELATED PATENT APPLICATIONS
[0001] This patent application claims priority to Patent Application No. 01000015.6 filed in Europe on Feb. 14, 2001, which is incorporated by reference. This application further claims the benefit of U.S. Provisional Application No. 60/271,857 filed Feb. 27, 2001, which is incorporated by reference.
Provisional Applications (1)
|
Number |
Date |
Country |
|
60271857 |
Feb 2001 |
US |