Patent ID: 8157909

Claim:
A mixture of platelet-shaped, copper-containing metallic effect pigments having a total metal content and having a copper content of 60% to 100% by weight, based on the total metal content, with at least one further component, wherein the copper-containing metallic effect pigments have a thickness distribution, determined via thickness counting by scanning electron microscopy (SEM) and represented as cumulative undersize distribution, a) with an h 50 of 10 to 100 nm, b) with an h 90 of 20 to 150 nm, and in that the at least one further component is at least one of a cellulose derivative selected from the group consisting of alkylcellulose, hydroxyalkylcellulose, alkyl(hydroxyalkyl)cellulose, and mixtures thereof, and at least one additive having at least one of antioxidative and radical-inhibiting properties.