Invention Grant
US08740253B2 Radiation curable embossed ink security devices for security documents 有权
用于安全文件的可辐射固化压花油墨安全装置

Radiation curable embossed ink security devices for security documents
Abstract:
A security document and a method of manufacturing a security document are provided in which a radiation curable ink is applied to at least one side of a substrate including at least one region of transparent plastics material forming a window or half-window area. The ink is embossed while soft and cured with radiation to form an embossed security device within the window or half-window area including one or more of a diffractive structure, a lens structure or other security element having a relief structure.
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