Abstract: Luster pigments based on multiply coated plateletlike silicatic substrates, obtainable by further coating substrates already coated with a first layer comprising a colorless or selectively absorbing metal oxidea) initially with a second, nonselectively absorbing layer consisting essentially of carbon, a metal or a metal oxide, andb) if desired subsequently with a third layer comprising colorless or selectively absorbing metal oxide, wherefor the carbon layer (step a) is applied by thermal decomposition of oxygen-containing hydrocarbons that for every two carbon atoms contain at least one oxygen atom, the metal layer (step a) is applied by gas phase decomposition of volatile compounds of these metals in an inert gas, and the metal oxide layer (step a and/or b) is applied by gas phase decomposition of volatile compounds of these metals in the presence of oxygen, water vapor or mixtures thereof to the substrates coated in case a) with a first metal oxide layer and in case b) additionally with a nonselectively ab

Abstract: Luster pigments based on multiply coated plateletlike metallic substrates comprisingA) a first layer consisting essentially of silicon oxide, aluminum oxide and/or aluminum oxide hydrate,B) a second layer consisting essentially of metal and/or nonselectively absorbing metal oxide, andC) if desired, a third layer consisting essentially of colorless or selectively absorbing metal oxide.

Abstract: Preparation of bluish luster pigments by treating titania-coated silicatic platelets with a reducing gas mixture, which comprises treating titania-coated silicatic platelets whose titania coating has a geometric layer thickness of from 10 to 60 nm at from 800.degree. to 900.degree. C. with a gas mixture comprising a vaporized organic compound and ammonia, and also bluish luster pigments based on silicatic platelets comprising a reduced titania coating with a geometric layer thickness of from 10 to 60 nm and CIELAB color coordinates -2.ltoreq.a*.ltoreq.2 and b*.ltoreq.-20 (measuring angle 20.degree., standard illuminant D65).

Abstract: Luster pigments based on multiply coated plateletlike metallic substrates comprise at least one layer packet comprisingA) a colorless coating having a refractive index n.ltoreq.1.8, andB) a selectively absorbing coating having a refractive index n.gtoreq.2.0and also if desired additionallyC) an outer, colorless or selectively absorbing coating different than the layer (B) underneath.

Abstract: Luster pigments based on coated plateletlike substrates comprising nitrogen-containing metal layers and if desired additionally one or more layers consisting essentially of colorless or selectively absorbing metal oxide, are prepared and used for coloring paints, inks, including printing inks, plastics, glasses, ceramic products and decorative cosmetic preparations.

Abstract: Silicon oxide-coated solid particles are produced by decomposing silanes which contain at least one alkanoyloxy radical with water vapor and/or oxygen in the presence of the agitated solid particles.

Abstract: Luster pigments comprising coated, plateletlike, silicatic substrates wherein the coating comprises a layer consisting essentially of carbon and aluminum oxide, chromium oxide, cerium oxide, zirconium oxide, antimony oxide or mixtures thereof, are obtainable by applying carbon-containing compounds of the metals aluminum, chromium, cerium, zirconium, antimony or mixtures thereof with or without further carbon-containing compounds of the molecular formula (CH.sub.2 O).sub.n, where n is from 1 to 6 for one monomeric unit, to the substrate particles and then thermally decomposing the carbon-containing compounds on the surface of the substrate particles under oxygen-excluding conditions.

Abstract: Passivated metallic pigments obtainable by gas-phase decomposition of volatile phosphorus compounds and of volatile nitrogenous silicon compounds with steam and/or oxygen in the presence of the agitated pigment particles, and the production of these pigments and their use for coloring water-based printing inks, other inks and paints.

Abstract: Luster pigments comprise coated plateletlike substrates wherein the coating comprises a layer comprising bismuth vanadate.

Abstract: Luster pigments based on coated, plateletlike, silicatic or metallic substrates wherein the coating comprises a metal sulfide are useful for coloring paints, printing inks, plastics, glasses, ceramic products and decorative cosmetic preparations.

Abstract: Luster pigments useful for coloring paints, printing inks, plastics, glasses, ceramic products and decorative cosmetic preparations are based on multiply coated plateletlike metallic substrates comprisingA) a first, colorless or selectively absorbing layer of metal oxide,B) a second, nonselectively absorbing layer of carbon, metal and/or metal oxide, andC) if desired a third, colorless or selectively absorbing layer of metal oxide.

Abstract: A simple process for achieving very active passivation of metal pigments against hydroxyl-containing compounds comprises treating the metal pigments with passivators in the gas phase.

Abstract: Mixtures useful as luster pigments for coloring paints, printing inks, plastics, decorative cosmetic preparations and ceramic products and usable in dry form in printing and coating processes consist ofA) iron oxide-coated aluminum particles andB) iron oxide-coated mica particles with or without a prior coating of a colorless, highly refractive metal oxide as essential components.