SECURITY SHEET COMPRISING SECURITY ELEMENTS FOR PREVENTING DUPLICATION, AND BEING RECOGNISABLE IN TRANSMITTED AND REFLECTED LIGHT, AND METHOD FOR MAKING SAME

摘要

A security sheet comprising at least one discontinuous security element (2) on the sheet surface (S). One portion (3) of the security element (2) is located on the surface of the sheet and the complementary portion (4) of the security element is located within said sheet. The security element (2) comprises at least one light-reflecting or light-diffracting surface. The sheet may be used as banknote paper.