IMPROVEMENTS RELATING TO PRINTING

A method of roughening a surface of a printing form precursor. The method comprises subjecting at least a part of the surface to energy in the form of pulses of electromagnetic radiation to produce a uniformly hydrophilic roughened surface on at least a part of the printing form precursor and option...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser:	BENNETT, Peter Andrew Reath, LIU, Dun, ADAMSON, John David
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 PROCESSES FOR THE MANUFACTURE OR REPRODUCTION OF PRINTINGSURFACES STAMPS TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	A method of roughening a surface of a printing form precursor. The method comprises subjecting at least a part of the surface to energy in the form of pulses of electromagnetic radiation to produce a uniformly hydrophilic roughened surface on at least a part of the printing form precursor and optionally converting the uniformly hydrophilic roughened surface of the printing form precursor to a uniformly hydrophobic roughened surface. The method is useful for providing a surface for use in a subsequent imaging and/or printing process in lithographic printing. Methods of providing a printing form comprising an image formed of hydrophobic regions and hydrophilic regions using said method and a method of printing using said method are also described, as are printing forms so produced and imaging devices and apparatus for carrying out the said methods.