Claims
- 1. A method for making a lithographic printing master wherein a hydrophilic cylindrical surface is provided with a continuous image recording layer by the steps ofbringing a donor material comprising a support and a layer which contains an image recording composition into physical contact with the cylindrical surface, and conveying the donor material along the cylindrical surface, thereby obtaining a transfer of the image recording composition from the donor material to the cylindrical surface, wherein the image recording composition comprises hydrophobic thermoplastic polymer particles dispersed in a hydrophilic binder and a compound capable of converting light into heat.
- 2. A method according to claim 1 wherein the transfer of the image recording composition is obtained by friction, said friction being generated byrotating the cylindrical surface at a speed C, which may be zero, and conveying the donor material along the cylindrical surface at a speed which is not equal to C.
- 3. Method according to claim 1 wherein the cylindrical surface is moistened with an aqueous liquid before bringing the donor material into physical contact with the cylindrical surface.
- 4. Method according to claim 1 wherein the cylindrical surface is cleaned before bringing the donor material into physical contact with the cylindrical surface.
- 5. Method according to claim 1 wherein the donor material is a web-shaped material which is conveyed along the cylindrical surface by unwinding the donor material from a supply roller and, after the physical contact with the cylindrical surface, winding-up the donor material on a take-up roller.
- 6. Method according to claim 1 wherein the cylindrical surface is the surface of a hydrophilic base material which is mounted on a cylinder of a rotary printing press.
- 7. Method according to claim 1 wherein the width of the donor material is substantially equal to the width of the lithographic printing master.
- 8. Method for making a lithographic printing master comprising the steps of(i) providing a hydrophilic cylindrical surface with a continuous image recording layer according to claim 1; (ii) image-wise exposing the image recording layer; (iii) removing the unexposed areas of the image recording layer by supplying fountain or ink to the cylindrical surface.
- 9. Method according to claim 8 wherein the image recording layer is exposed by means of an infrared laser.
- 10. Method according to claim 8 or 9 wherein steps (i), (ii) and (iii) are carried out in a rotary printing press comprising an integrated laser image-setter.
Priority Claims (1)
Number |
Date |
Country |
Kind |
99201315 |
Apr 1999 |
EP |
|
Parent Case Info
Benefit is claimed under 35USC119(e) based on provisional Application Ser. No. 60/132,167 filed May 3, 1999.
US Referenced Citations (3)
Number |
Name |
Date |
Kind |
5045697 |
Schneider |
Sep 1991 |
|
5072671 |
Schneider et al. |
Dec 1991 |
|
5601022 |
Dauer et al. |
Feb 1997 |
|
Foreign Referenced Citations (1)
Number |
Date |
Country |
0 770 495 |
May 1997 |
EP |
Provisional Applications (1)
|
Number |
Date |
Country |
|
60/132167 |
May 1999 |
US |