Multiply coated metallic luster pigments

DETAILED DESCRIPTION We claim: 1.
Luster pigments based on multiply coated platelet-shaped metallic substrates comprising A) a first layer consisting essentially of silicon oxide, silicon oxide hydrate, aluminum oxide and/or aluminum oxide hydrate, B) a second layer consisting essentially of metal and/or nonselectively absorbing metal oxide, and C) if desired, a third layer consisting essentially of colorless or selectively absorbing metal oxide, obtainable by a) wet-chemical coating of the substrate particles with silicon oxide, silicon oxide hydrate, aluminum oxide and/or aluminum oxide hydrate by hydrolytic decomposition of organic silicon and/or aluminum compounds in which the organic radicals are attached to the metals via oxygen atoms in the presence of an organic solvent in which the metal compounds are soluble with or without subsequent drying, b) further coating of the particles obtained in step a) with metal by b1) gas phase decomposition of volatile metal compounds in an inert atmosphere or b2) electroless, wet-chemical metal deposition with or without subsequent drying or with nonselectively absorbing metal oxide by b3) gas phase decomposition of volatile metal compounds in the presence of oxygen and/or water vapor and c) if desired additional coating of the particles obtained in step b) with colorless or selectively absorbing metal oxide by c1) gas phase decomposition of volatile metal compounds in the presence of oxygen and/or water vapor or c2) wet-chemical coating by hydrolytic decomposition of organic metal compounds in which the organic radicals are attached to the metals via oxygen atoms in the presence of an organic solvent in which the metal compounds are soluble and subsequent drying.
2.
Luster pigments as claimed in claim 1 wherein the layer (B) consists essentially of chromium, molybdenum, tungsten, iron, cobalt, nickel, silver, copper, gold, palladium, platinum, nickel alloys, cobalt alloys, silver-gold alloys, magnetite, nickel oxide, cobalt oxide and/or vanadium oxide