Abstract: The present invention relates to novel pearlescent pigments based on substrates comprising at least one selectively light absorbing layer, which consists of a chalcogenide and/or oxychalcogenide, preferably sulfides or oxysulfides. The coatings can be directly prepared by the precipitation of chalcogenides in liquid suspension onto the substrates. Preferably, metal oxides or mixed metal oxides are coated onto the substrate; the resulting precursor is transferred into a furnace and calcined under a sulfurizing gas flow to convert the oxides into oxysulfides and/or sulfides depending on the reaction parameters. The conversion to sulfides and/or oxysulfides is preferably carried out in a fluidized bed reactor. Angle-dependent optical pigments are thus produced, which are especially useful in paints, powder coatings, paper coatings, plastics, cosmetics, inks and security-enhancing features as well as ion decorative applications for foods and drugs.

Abstract: The present invention relates to novel pigments based on substrates coated with at least one selectively light absorbing layer of fluorides, oxyfluorides, fluorosulfides and/or oxyfluorosulfides. Metal oxides or mixed metal oxides are coated onto a substrate; the resulting precursor is transferred into a furnace and calcined under a fluoridizing and/or sulfurizing gas flow to convert the oxides into fluorides, oxyfluorides, fluorosulfides and/or oxyfluorosulfides depending on the reaction parameters. The conversion to fluorides, oxyfluorides, fluorosulfides and/or oxyfluorosulfides is preferably carried out in a fluidized bed reactor. Angle-dependent optical pigments are thus produced which are especially useful in paints, powder coatings, paper coatings, plastics, cosmetics, inks and security-enhancing features as well as in decorative applications for foods and drugs.

Abstract: The present invention relates to pearlescent pigments based on substrates coated with one or more layers of nitrides or oxynitrides to a method for the production of such pigments and their use in plastics, paints, coatings, powder coatings, inks, printing inks, glasses, ceramic products, agriculture foils, for lasermarking of papers and plastics, security applications and in cosmetic formulations.