Method for making a lithographic printing master
AssigneeAgfa-Gevaert
InventorsEric Verschueren, Joan Vermeersch
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Abstract
A method for making a lithographic printing master is disclosed. The method comprises a step of providing a hydrophilic cylindrical surface, e.g. an aluminium plate mounted on the plate cylinder of a printing press, with an image recording composition by transfer from a donor material. The donor material comprises a support and a transfer layer which comprises hydrophobic thermoplastic polymer particles dispersed in a hydrophilic binder and a compound capable of converting light to heat. The transfer is obtained by friction between the donor layer and the cylindrical surface and/or by moistening the cylindrical surface with an aqueous liquid. The method is especially suited for on-press coating and on-press imaging in computer-to-press procedures.
Claims10
A method for making a lithographic printing master wherein a hydrophilic cylindrical surface is provided with a continuous image recording layer by the steps of
- bringing 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.
Dependencies are inferred from the claim text.