Production of pigments having a defined size and shape
AssigneeGiesecke+Devrient Currency Technology GmbH
InventorsMaik Rudolf Johann Scherer, Kai Herrmann Scherer
Life of this patent
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Abstract
A method is provided for manufacturing pigments of defined size and shape, and to pigments manufactured accordingly. The method has the steps of: a) producing a three-dimensional surface structure on a substrate, where surface regions are formed each having a gradient extending obliquely to a base level of the surface structure, and are arranged in columns which are offset relative to one another; b) applying a pigment material layer on the surface structure; c) releasing the pigment material layer from the surface structure and producing pigments.
Claims14
A method for manufacturing pigments of defined size and shape, with the steps of:
- a) producing a three-dimensional surface structure on a substrate, where surface regions are formed which each have a gradient extending obliquely from a base level of the surface structure and a surface extending approximately perpendicular from the base level, and wherein successive surface regions repeat in a first direction along a surface of the substrate to form parallel columns which are offset relative to one another in a second direction along the surface of the substrate that is perpendicular to the first direction;
- b) applying a pigment material layer on the surface structure;
- c) separating the pigment material layer from the surface structure and producing pigments.
Dependencies are inferred from the claim text.