Patent ID: 7637994

Claim:
A color pigment comprising: at least 70.0 weight % of a first compound COP according to Formula (COP-I) based upon the total weight of the color pigment: wherein one of R 1 and R 2 is hydrogen and the other one of R 1 and R 2 represents —COOR 4 ; R 4 and R 5 represent methyl; R 3 is selected from the group consisting of: and * represents the point of attachment of R 3 to the nitrogen in Formula (COP-1); wherein the color pigment has a pigment surface including between 2.0 and 30.0 weight % of a second compound SEC according to Formula (SEC-I) based upon the total weight of the color pigment: wherein one of R 1′ and R 2′ is hydrogen and the other one of R 1′ and R 2′ represents —COOR 4′ ; R 4′ and R 5′ represent methyl or hydrogen; R 3′ is selected from the group consisting of: and * represents the point of attachment of R 3′ to the nitrogen in Formula (SEC-I), with the proviso that at least one of R 4′ and R 5′ represents hydrogen.