Methods for printing tactile security features
First Claim
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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Accused Products
Abstract
A process for manufacturing a security feature having a tactile pattern, said method including applying on a substrate a radiation-curable basecoat composition by a process selected from inkjet, offset, screen printing, flexo printing and rotogravure; at least partially or fully radiation-curing the 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 of screen printing, flexo printing or rotogravure; radiation-curing said radiation-curable topcoat composition so as to form a radiation-cured topcoat. The radiation-curable basecoat composition and/or the radiation-curable topcoat composition includes one or more machine readable feature substances independently selected from cholesteric liquid crystal pigments, luminescent compounds, infrared-absorbing compounds, magnetic compounds and mixtures thereof. 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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Citations
24 Claims
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1. A process for manufacturing a security feature comprising a tactile pattern, said method comprising:
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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, and wherein the radiation-cured basecoat has a surface energy at least 15 mN/m less than the surface energy of the radiation-cured topcoat. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A security feature comprising a substrate and a tactile pattern of a radiation-cured basecoat and a radiation-cured topcoat, said radiation-cured topcoat being in the form of indicia and at least partially covering said radiation-cured basecoat,
wherein at least one of said radiation-cured basecoat and said radiation-cured topcoat comprises at least one machine-readable feature substance independently selected from the group consisting of cholesteric liquid crystal pigments, luminescent compounds, infrared-absorbing compounds, magnetic compounds, and mixtures thereof, wherein said basecoat has a surface energy of at least 15 mN/m less than the surface energy of the topcoat, and wherein said basecoat and said topcoat are made from radiation-curable compositions.
Specification