METHODS FOR PRODUCING SECURITY FEATURES EXHIBITING ONE OR MORE INDICIA

    公开(公告)号:US20240351361A1

    公开(公告)日:2024-10-24

    申请号:US18685142

    申请日:2022-08-18

    申请人: SICPA HOLDING SA

    摘要: The present invention relates to the field of methods for producing eye-catching overt security features exhibiting one or more indicia as anti-counterfeit means on security documents or security articles as well as decorative purposes. In particular, the present invention provides methods for producing security features that can be easily, directly and unambiguously authenticated by the human without any external device or tool, wherein said security features comprised a cured UV-Vis radiation cationically or hybrid curable coating composition and cured one or more indicia, said composition comprising an ink vehicle and pigments comprising a flake-shaped non-metallic or metallic substrate comprising one or more at least partial coating layers, an at least partial surface treatment layer made of one or more surface modifiers based on perfluoropolyethers.

    Multilayer optical thin film structure

    公开(公告)号:US12055740B2

    公开(公告)日:2024-08-06

    申请号:US17045005

    申请日:2019-04-03

    发明人: Penghui Ma

    摘要: There is described a multilayer optical thin film structure comprising multiple optically absorbing layers and multiple optically non-absorbing layers. The optically absorbing layers and the optically non-absorbing layers are configured such that light incident on the structure is reflected with a red colour at a first angle, and light incident on the structure is reflected with a yellow colour at a second angle. There is also described an item having applied thereto such a multilayer structure.