Abstract: Effect pigments based on a flake-form substrate that have a circular or elliptical shape or have the shape of a polygon, the preparation thereof, and the use thereof, for example, in paints or coatings, or as tracers.

Abstract: The invention relates to flake-form effect pigments, characterised in that they consist of transparent or semitransparent materials and have a groove or grid structure, to processes for the production thereof, and to the use thereof.

Abstract: The invention relates to multilayered luster pigments based on metallic substrates, which are completely surrounded by a plurality of layers, where these layers comprise at least one layer pack (A) having a colorless dielectric layer of a material with a refractive index n of ?1.8, and a colorless dielectric layer of a material with a refractive index n of >1.8, and a selectively or non-selectively absorbent layer (B), and to a process for their production, and to their use.

Abstract: Effect pigments based on a flake-form substrate that have a circular or elliptical shape or have the shape of a polygon, the preparation thereof, and the use thereof, for example, in paints or coatings, or as tracers.

Abstract: Multilayered systems having optical properties based on metallic substrates comprise both a layer (A) of at least two dielectric materials of different refractive index, where the refractive index at the lower side and the refractive index at the upper side of layer (A) are different, and a selectively or non-selectively absorbent layer (B).

Abstract: Multilayer pearl luster pigment on the basis of a platelet-shaped substrate comprising a material having a refractive index of more than 1.8, which comprises at least (i) a first layer of a material of low refractive index in the range from 1.35 to 1.8, (ii) optionally, a second layer of a material having a refractive index of more than 1.8. (iii) a semitransparent metal layer which is applied to the substrate or to the layers (i) or (ii) and (iv) if desired, an aftercoating, the substrate being platelet-shaped titanium dioxide, zirconium dioxide, &agr;-iron(III) oxide, tin dioxide or zinc oxide.

Abstract: Multilayer pearl lustre pigment on the basis of a platelet-shaped substrate comprising a material of low refractive index in the range from 1.35 to 1.8, which comprises at least (i) one first layer comprising a material having a refractive index of more than 1.8, (ii) optionally, a second layer comprising a material of low refractive index in the range from 1.35 to 1.8, (iii) a semitransparent metal layer which is applied to the substrate or to the layers (i) or (ii), and (iv) if desired, an aftercoating, the substrate being platelet-shaped silicon dioxide, aluminium oxide, boron oxide or magnesium fluoride.

Abstract: An optical multilayered system comprises metal layers and a plurality of layers, where these layers comprise at least one layer pack (A) comprising a colorless dielectric layer of a material having a refractive index n of ≦1.8 and a colorless dielectric layer of a material having a refractive index n of >1.8, and a selectively or non-selectively absorbent layer (B).

Abstract: Multilayered systems having optical properties based on metallic substrates comprise both a layer (A) of at least two dielectric materials of different refractive index, where the refractive index at the lower side and the refractive index at the upper side of layer (A) are different, and a selectively or non-selectively absorbent layer (B).

Abstract: The invention relates to multilayered luster pigments based on metallic substrates, which are completely surrounded by a plurality of layers, where these layers comprise at least one layer pack (A) having a colorless dielectric layer of a material with a refractive index n of ≦1.8, and a colorless dielectric layer of a material with a refractive index n of >1.8, and a selectively or non-selectively absorbent layer (B), and to a process for their production, and to their use.

Abstract: Multilayer pearl luster pigment based on an absorbing platelet-shaped substrate which is coated with alternating layers of a material of low refractive index and a material of high refractive index, or with a metal, the difference in the refractive indices being at least 0.1.