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1. (WO2016063052) IMPROVEMENTS IN SECURITY PAPERS AND DOCUMENTS

Pub. No.:    WO/2016/063052    International Application No.:    PCT/GB2015/053144
Publication Date: Fri Apr 29 01:59:59 CEST 2016 International Filing Date: Thu Oct 22 01:59:59 CEST 2015
IPC: B42D 25/23
B42D 25/333
B42D 25/24
B42D 25/378
Applicants: DE LA RUE INTERNATIONAL LIMITED
Inventors: HENDERSON, Peter McLean
SUGDON, Matthew Charles
STEWART, Georgina
Title: IMPROVEMENTS IN SECURITY PAPERS AND DOCUMENTS
Abstract:
The present invention is directed towards security paper (10, 50) comprising at least one layer (11, 12, 51) of fibrous substrate and a security deposit (18, 56) thereon. The at least one layer (11, 12, 51) has a main body (15, 55) of a substantially uniform thickness and at least one aperture (17) and/or zone (16, 54) of reduced thickness. The reduced thickness is non-zero and at least 15% less than the thickness of the main body (15, 55). The security deposit (18, 56) comprises at least one element which partially covers the fibrous substrate exposed in the at least one aperture (17) and/or zone (16, 54) of reduced thickness. Therefore, when the at least one layer (11, 12, 51) is split through its thickness into first and second portions (26, 58), a hole is provided in the first portion and the at least one element is provided on the fibrous substrate of the second portion (26, 58). The invention further relates to a method of manufacturing said security paper (10, 50) and security documents (20) comprising said security paper (10, 50).