Effect pigment, production method, value document and printing ink
AssigneeGiesecke+Devrient Currency Technology GmbH
InventorsMichael Rahm, Manfred Heim, Raphael Dehmel, Winfried Hoffmuller
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Abstract
A platelet-shaped magnetic effect pigment is provided for use in a printing ink, and includes a layer construction with a magnetic layer and at least one optical functional layer, such that the magnetic layer is based on a magnetic material having a column-shaped nanostructure and the magnetic columns respectively have a largely uniform preferential magnetic direction deviating from the platelet plane.
Claims22
A platelet-shaped magnetic effect pigment for use in a printing ink, comprising a layer construction with a magnetic layer and at least one optical functional layer,
- wherein the magnetic layer is based on a magnetic material having a column-shaped nanostructure and magnetic columns respectively have a largely uniform preferential magnetic direction deviating from a platelet plane.
Dependencies are inferred from the claim text.