TAMPER EVIDENT SECURITY DOCUMENT WITH COLOURED LAYER

摘要

A tamper evident security document (20) and method of manufacture is provided in which a coloured security layer (22) is applied on one side of a substrate (21 ) and one or more opacifying layers (23, 24) are applied to conceal the security layer (22). At least one of the opacifying layers (23) includes an embedded security device (25) such that removal of the security device (25) causes removal of the opacifying layer (23) to reveal the coloured security layer (22).