FIELD: printing industry.
SUBSTANCE: invention relates to a method of manufacturing a security element comprising a tactile structure comprising the steps of applying a radiation curable first layer composition to a substrate using a process selected from the group consisting of inkjet, blanket, screen printing, flexographic printing and rotogravure printing; at least partial or complete curing by radiation of said radiation-curable composition of the first layer to produce a radiation-cured first layer; applying to the radiation-cured first layer obtained in step ii), the radiation-curable top-layer composition in the form of a sign using a method selected from the group consisting of screen printing, flexographic printing and rotational intaglio printing; curing by radiation of mentioned radiation-curable top layer composition to produce a radiation-cured upper layer in which the radiation curable first layer composition and/or the radiation-curable top layer composition comprises one or more of the machine-readable elements, independently selected from the group consisting of cholesteric liquid crystal pigments, luminescent compounds absorbing infrared radiation magnetic compounds and mixtures thereof, and in which the radiation-cured first layer has a surface energy of at least 15 mN/m less than the surface energy of the radiation-cured upper layer. The present invention furthermore relates to a corresponding protective element and its use to protect the security document from the counterfeiting and falsification.
EFFECT: security element provides a significantly higher resistance of protection against forgery.
18 cl, 4 tbl
