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Effect pigments with colour flop comprising SiO2 laminars coated with metal oxides, useful in e.g. cosmetics and coating for pharmaceuticals, has colour flop extending through all four quadrants of a,b-colour coordinate system
Effect pigments with colour flop comprising SiO2 laminars coated with metal oxides, useful in e.g. cosmetics and coating for pharmaceuticals, has colour flop extending through all four quadrants of a,b-colour coordinate system
Effect pigments with a colour flop comprise SiO 2 laminars coated with metal oxides and with unit layer thickness. The colour flop extends through all four quadrants of the a,b-colour coordinate system (L,a,b-system according to CIELAB). The layer thickness tolerance of the SiO 2 laminar with a unit layer thickness comes to 3-10% of the overall dry layer thickness of the particles. The thickness of the SiO 2 is 520-560 nano-meters, and the diameter between 1 and 250 micrometers. An independent claim is also included for the manufacture of effect pigments as above where SiO 2 laminars with a unit thickness layer are coated with metal oxides.
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