Waterless lithographic printing plates

B - Operations – Transporting – 41 – N

Patent

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Details

B41N 1/04 (2006.01) B41C 1/10 (2006.01) B41N 1/00 (2006.01) B41N 1/14 (2006.01) G03F 7/004 (2006.01) G03F 7/36 (2006.01) G03F 7/38 (2006.01)

Patent

CA 2332400

Provided is a media-fluid material set for use in preparing a waterless lithographic printing plate. The media fluid material set comprises a media with a support that bears a hydrophilic receiving surface having ink-receiving properties, together with a fluid material comprising a liquid carrier medium and a reactive transition metal complex of a fluorinated organic acid. After an application of the fluid material to the hydrophilic recieving surface, the reactive complex reacts to form a durable ink-releasing layer. Such a media-fluid material set can be advantageously used in preparing waterless lithographic printing plates with ink-releasing layers comprising such fluorinated reaction products. Also provided are imaged waterless lithographic printing plates with such ink-releasing layers made by an ink jet printing application or by laser-induced thermal ablation, and methods of making such waterless lithographic printing plates.

L'invention concerne un ensemble de matériel comprenant un support et un fluide pour la préparation d'une plaque de lithographie à sec. L'ensemble de matériel support-fluide se compose d'un support comprenant une base à surface de réception hydrophile qui présente des propriétés de réceptivité à l'encre, associé à un matériau fluide qui contient un véhicule liquide et un complexe de métal de transition réactif comprenant un acide organique fluoré. Après application du matériau fluide sur la surface de réception hydrophile, le complexe réactif réagit pour former une couche de libération d'encre durable. Un tel ensemble de matériel support-fluide permet de préparer aisément des plaques de lithographie à sec qui comportent des couches de libération d'encre contenant les produits réactionnels fluorés décrits. L'invention concerne également des plaques de lithographie à sec portant un motif, et comprenant de telles couches de libération d'encre, réalisées par impression à jet d'encre ou par ablation thermique au laser, et des procédés permettant de préparer de telles plaques de lithographie à sec.

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