Materials coated with plate-like pigments
AssigneeMerck Patent GmbH
InventorsConstanze Prengel, Klaus-Dieter Franz, Hartmut Hartner, Manfred Kieser, Axel von Daacke, Klaus Bernhardt
Life of this patent
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Abstract
Materials coated with plate-like pigments and characterized in that the coating shows structuring in defined areas due to a difference in the orientation of the pigment particles are highly suitable in the area of general security printing.
Claims17
A material having a coating of particles of at least one platelet-shaped, nacreous pigment, wherein the coating has structuring in defined areas due to a difference in orientation of the pigment particles, and the material exhibits a visible, non-photoreproducible image.
A material having a coating of magnetically alignable particles of at least one platelet-shaped, nacreous pigment, wherein the coating has structuring in defined areas due to a difference in orientation of the pigment particles, whereby a visible, non-photoreproducible image is formed.
A process for the preparation of a material containing a visible, non-photoreproducible image, comprising coating a substrate with a layer of mobile, platelet-shaped, nacreous pigment particles, producing at least one area of distinct particle orientation in said pigment particles, and immobilizing the particle layer, whereby the resultant material has a visible, non-photoreproducible image.
A process for the preparation of a material containing a visible, non-photoreproducible image, comprising coating a substrate with a layer of mobile, platelet-shaped, nacreous pigment particles, producing at least one area of distinct particle orientation in said pigment particles by magnetically aligning the particles in said area, and immobilizing the particle layer, whereby the resultant material has a visible, non-photoreproducible image.
Dependencies are inferred from the claim text.