A METHOD OF MANUFACTURING A SECURITY SHEET AND A SECURITY SHEET

A method of manufacturing a security sheet (45, Fig.1C) comprising a plastic substrate 20 which has opposing first and second outer surfaces 21, 22, a first concealing region 25 extending between the first and second outer surfaces and a laser markable region 29 at least partially located between th...

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Bibliographische Detailangaben
Hauptverfasser:	MARTINS, Annalise, HUSMANN, Christoph, QUAINTON, Simon
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	BOOK COVERS BOOKBINDING COLOUR PRINTING DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDEDFOR FILES LINING MACHINES LOOSE LEAVES MOVABLE-STRIP WRITING OR READING APPARATUS PERFORMING OPERATIONS PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITYFEATURES PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOTOTHERWISE PROVIDED FOR PRINTING PRINTING, DUPLICATING, MARKING, OR COPYING PROCESSES SPECIAL PRINTED MATTER STAMPS TRANSPORTING TYPEWRITERS
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Beschreibung
Zusammenfassung:	A method of manufacturing a security sheet (45, Fig.1C) comprising a plastic substrate 20 which has opposing first and second outer surfaces 21, 22, a first concealing region 25 extending between the first and second outer surfaces and a laser markable region 29 at least partially located between the first concealing region and the second outer surface. Laser radiation 36 is directed from the first outer surface, through the first concealing region and onto the laser markable region to form at least one data element (40, Fig.1C) in the laser markable region such that the at least one data element is hidden from view by the first concealing region when the first outer surface is viewed by the naked eye in reflected light. The at least one data element may be visible to the naked eye when the first outer surface is viewed in transmitted light. The plastic substrate may comprise a second concealing region 27 extending between the laser markable region and the second outer surface and wherein the data element(s) is hidden from view by the second concealing region when the second outer surface is viewed by the naked eye in reflected light.