Fountain solution for a diazobased lithographic printing plate

The present invention provides a fountain solution for a diazo-based lithographic printing plate comprising a dextran whereof at least part of the hydroxyl groups have been modified into an amine and/or ammonium containing organic residue. The fountain solution preferably also contains hexylene glyc...

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Bibliographische Detailangaben
Hauptverfasser:	VERMEERSCH,JOAN TRIPHON, HUNSEL,JOHAN HUBERT VAN, HEUGEBAERT,FRANS CLEMENT
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	LINING MACHINES MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING,INKING, DAMPING, OR THE LIKE PERFORMING OPERATIONS PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM PRINTING PRINTING PLATES OR FOILS STAMPS TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	The present invention provides a fountain solution for a diazo-based lithographic printing plate comprising a dextran whereof at least part of the hydroxyl groups have been modified into an amine and/or ammonium containing organic residue. The fountain solution preferably also contains hexylene glycol. Scumming and ink staining of diazo-based lithographic printing plates developed by plain water is avoided.