Aluminium sheet with rough surface

Aluminium sheet suitable for use as a lithographic plate support has a surface that is uniformly rough by virtue of: a rippled topography having an aspect ratio of at least 1.3 on a sale of 5-200 mum; and a superimposed pitted structure on a scale of 1-20 mum. A method of making the aluminium sheet...

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Bibliographische Detailangaben
Hauptverfasser:	BALL JONATHAN, AMOR MARTIN PHILIP, LIMBACH PETER KARL FERDINAND
Format:	Patent
Sprache:	eng
Schlagworte:	LINING MACHINES MATERIALS FOR SURFACES USED IN PRINTING MACHINES FOR PRINTING,INKING, DAMPING, OR THE LIKE MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVINGMATERIAL PERFORMING OPERATIONS PREPARING SUCH SURFACES FOR USE AND CONSERVING THEM PRINTING PRINTING PLATES OR FOILS PUNCHING METAL ROLLING OF METAL STAMPS TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	Aluminium sheet suitable for use as a lithographic plate support has a surface that is uniformly rough by virtue of: a rippled topography having an aspect ratio of at least 1.3 on a sale of 5-200 mum; and a superimposed pitted structure on a scale of 1-20 mum. A method of making the aluminium sheet involves pack rolling two aluminium ribbons to generate facing surfaces having the transverse rippled structure; followed by a small amount of a conventional roughening or graining treatment to develop the pitted structure.