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    • 127. 发明公开
    • Security elements, and methods and apparatus for their manufacture
    • 查尔斯·韦尔法伦
    • EP2792497A1
    • 2014-10-22
    • EP14177410.9
    • 2011-01-28
    • De La Rue International Limited
    • Bargir, Sameer MohammedHowland, Paul
    • B41M3/00B41M3/14B41F13/08B41F13/18B42D15/00B42D25/00B41M7/00B41F11/02
    • B42D25/369B05D3/207B41F11/02B41M3/14B42D25/00B42D25/29B42D25/355B42D2033/16Y10T428/24Y10T428/24802
    • A security element comprising a magnetic layer and a print layer disposed on a translucent substrate is provided. The print layer is disposed between the magnetic layer and the substrate, and the magnetic layer comprises a composition having magnetic or magnetisable particles therein, each particle having at least one substantially planar surface. The print layer includes printed authentication data and the magnetic or magnetisable particles are orientated such that in a region of the magnetic layer covering at least part of the authentication data, at least some of the magnetic or magnetisable particles are orientated with their planar surfaces substantially parallel to the plane of the substrate, such that the authentication data is substantially concealed when the security element is viewed in reflected light at least along the normal to the substrate. The printed authentication data is of sufficient optical density that the authentication data is visible through the region of the magnetic layer when viewed in transmitted light.
    • 提供了一种安全元件,其包括设置在透光性基板上的磁性层和印刷层。 印刷层设置在磁性层和基底之间,并且磁性层包括其中具有磁性或可磁化颗粒的组合物,每个颗粒具有至少一个基本平坦的表面。 打印层包括打印的认证数据,并且磁性或可磁化颗粒定向成使得在磁性层的至少部分认证数据的区域中,磁性或可磁化颗粒中的至少一些以其平面表面基本上平行 使得当至少沿着基板的法线在反射光中观看安全元件时,认证数据基本上被隐藏。 打印的认证数据具有足够的光密度,当在透射光下观察时认证数据可以通过磁性层的区域可见。