Patent ID: 8702861
Filing Date: 2014-04-22
Classification: B82Y,C01P,C09C,C09D

Abstract:
1. An ink composition comprising a water resistant aluminum pigment and water, wherein the water resistant aluminum pigment is formed of an aluminum pigment and a covering film that contains Si and is formed on the surface of the aluminum pigment; wherein a 50% average particle diameter of a corresponding circle obtained by calculation from areas of X-Y plain surfaces of the aluminum pigment is in a range from 0.5 μm to 3 μm; wherein the maximum particle diameter of the corresponding circle obtained by calculation from the areas of the X-Y plain surfaces of the aluminum pigment is 10 μm or less; and wherein the coverage ratio of the covering film, formed by hydrolysis of a silane compound, on the surface of the aluminum pigment, calculated from presence ratios of C, O, Al, and Si detected by XPS measurement at an incident angle of 30°, is in a range from 30% to 90%.