Abstract: A fine yellow composite iron oxide hydroxide pigment of the present invention has an average major axial diameter of not less than 0.005 .mu.m and less than 0.1 .mu.m, which comprises:fine goethite particles as core particles, containing aluminum inside thereof in an amount of 0.05 to 50% by weight, calculated as Al, based on the weight of said core particles; anda composite oxide hydroxide of Fe and Al, coated on the surface of each core particle. Such fine yellow composite iron oxide hydroxide pigment are excellent in transparency and heat resistance.

Abstract: Yellow iron oxide hydroxide particles comprising:iron oxide hydroxide particle as a core, andcomposite oxide hydroxide of Fe and Al deposited on surface of said iron oxide hydroxide particle as a core wherein the amount of Al in said composite oxide hydroxide is 0.1 to 10% by weight, calculated as Al, based on the weight of said iron oxide hydroxide as a core, the amount of Fe in said composite oxide hydroxide is 0.1 to 50% by weight, calculated as Fe, based on the weight of said iron oxide hydroxide particle as a core, and the ratio of Al to Fe in said composite oxide hydroxide is 0.05:1 to 2:1, calculated as Al and Fe atoms,said yellow iron oxide hydroxide particles having an average major axis diameter of 0.1 to 1.0 .mu.m, an average minor axis diameter of 0.02 to 0.10 .mu.m, an aspect ratio (major axis diameter/minor axis diameter) of 2 to 20, a BET specific surface area of 10 to 180 m.sup.2 /g and a heat-resistance temperature of not less than 255.degree. C.

Abstract: A pigment of the present invention comprises:pigment particle as core particle;a lower coat formed on at least a part of surface of the pigment particle, comprising squaric acid, polyol having an anthraquinone skeleton represented by the general formula (I): ##STR1## wherein m is an integer of 0 to 4, n is an integer of 0 to 4 and m+n is an integer of 2 to 4,or a mixture of the squaric acid and the polyol having an anthraquinone skeleton represented by the general formula (I); andan upper coat formed on at least a part of surface of the obtained particle, comprising at least one alkylene glycol represented by the general formula (II):C.sub.q H.sub.2q (OH).sub.2 (II)wherein q is an integer of 2 to 10.Such pigment has excellent dispersion facility, dispersion homogeneity and dispersion stability, and is suitably used for not only organic solvent-type paints but also water-based paints.