A polymer substrate (1 ) for a security document, the substrate having at least one elongate transparent region (3) extending through a more opaque area of the substrate and completely or almost completely between spaced locations on the boundary of the substrate. The width of the transparent region (3) is at least 2mm and the transparent region has an optical density not exceeding 0.3.
申请公布号
WO2009098435(A2)
申请公布日期
2009.08.13
申请号
WO2009GB00242
申请日期
2009.01.29
申请人
DE LA RUE INTERNATIONAL LIMITED;ROST, STUART, WILLIAM;WINCHCOMBE, JOHN, PHILIP;EASTELL, CHRISTOPHER, JOHN
发明人
ROST, STUART, WILLIAM;WINCHCOMBE, JOHN, PHILIP;EASTELL, CHRISTOPHER, JOHN