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Methods for printing tactile security features

  • US 9,616,699 B2
  • Filed: 04/16/2013
  • Issued: 04/11/2017
  • Est. Priority Date: 06/11/2012
  • Status: Active Grant
First Claim
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1. A process for manufacturing a security feature comprising a tactile pattern, said method comprising:

  • applying on a substrate a radiation-curable basecoat composition by a process selected from the group consisting of inkjet, offset, screen printing, flexo printing and rotogravure;

    at least partially radiation-curing said radiation-curable basecoat composition so as to obtain a radiation-cured basecoat;

    applying on the radiation-cured basecoat a radiation-curable topcoat composition in a form of indicia by a process selected from the group consisting of screen printing, flexo printing and rotogravure; and

    radiation-curing said radiation-curable topcoat composition so as to form a radiation-cured topcoat,wherein at least one of the radiation-curable basecoat composition and the radiation-curable topcoat composition comprises one or more machine readable feature substances independently selected from the group consisting of cholesteric liquid crystal pigments, luminescent compounds, infrared-absorbing compounds, magnetic compounds and mixtures thereof, andwherein the radiation-cured basecoat has a surface energy at least 15 mN/m less than the surface energy of the radiation-cured topcoat.

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