The present invention relates to pigments comprising at least one inorganic compound selected from the group of iron oxides, iron oxide hydroxides, zinc ferrites, zinc oxides, magnesium ferrites and manganese ferrites, wherein the at least one inorganic compound is equipped with a coating comprising at least one hydroxide or oxide of magnesium or calcium and at least one fatty acid salt, to processes for production thereof, to the use thereof for coloring polyvinyl chloride (PVC) and to processes for coloring PVC and to PVC colored with such pigments, and also to plastics products comprising such pigments.