Sicpa Holding Sa

Riccardo Ruggerone

Patrick Veya

Thibaut Martini

Jean Garnier

Gebhard Ritter

Hervé Pittet

The invention relates to the field of the protection of security documents such as for example banknotes and identity documents against counterfeit and illegal reproduction. In particular, the present invention provides methods for producing optical effect layers exhibiting one or more indicia on a substrate, said method comprising a step of exposing a coating layer comprising non-spherical magnetic or magnetizable pigment particles to a magnetic field of a magnetic-field generating device so as to orient at least a part of the magnetic or magnetizable pigment particles; a step of applying a top coating composition on top of the coating layer and in the form of one or more indicia, and a step of at least partially curing the coating layer and the one or more indicia with a curing unit.

Methods for producing optical effect layers comprising magnetic or magnetizable pigment particles and exhibiting one or more indicia

The present invention relates to the technical field of security documents comprising a security feature, such as a windowed security thread, a security foil, a security patch, a hologram or an ink printed security feature, and a protective coating, and methods of manufacturing of said security documents. The security feature has a security feature thickness tof at least about 5 &#x3bc;m (micrometers) and a security feature surface facing away from the substrate consisting of a first region adjacent to the edges of the security feature and a second region non-adjacent to the edges of the security feature. The protective coating covers the security feature surface facing away from the substrate, a first substrate surface adjacent to the edges of the security feature, and a second substrate surface, which is different from the substrate surface covered by the security feature and the first substrate surface. The protective coating covering the security feature surface facing away from the substrate and the first substrate surface is transparent, the protective coating covering the first region has a thickness t, the protective coating covering the second region has a thickness t, the protective coating covering the first substrate surface has a thickness t, and the protective coating covering the second substrate surface has a thickness t. The thickness tis larger than the thickness t, which is larger than the thickness t; the thickness tis larger than the thickness t; and either the thickness tis larger than the thickness t, which is larger than or equal to the thickness t; or the thickness tis equal to the thickness t, which is larger than the thickness t. The variable protective coating thickness on the surface of the security document provides the inventive security document with an increased resistance against physical and chemical attacks from the environment, while maintaining the mechanical resistance properties required for such security documents.

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Echallens, Switzerland

Riccardo Ruggerone