The invention relates to effect pigments comprising a plate-shaped substrate that is provided at least on one side with at least one coating of semi-transparent metal and/or at least one highly refractive coating having a refractive index that is = 2.0. The effect pigments are characterised in that the plate-shaped substrate has at least one inorganic/organic mixed phase. The invention also relates to a method for producing said type of effect pigments, consisting of the following steps: a) at least one organic network former and at least one reactive organic component and at least one inorganic network former and/or nanoscale, inorganic particles as well as a liquid phase are mixed, thus forming a reaction composition, b) said reaction composition is placed on a flat substrate, c) a hard inorganic/organic mixing phase is formed, d) the inorganic/organic mixed phase is transformed into plate-shaped substrates, e) the plate-shaped substrates are coated with at least one coating made of semi-transparent metal and/or at least one highly refractive coating having a refractive index that is = 2.0. The invention further relates to the use of effect pigments in lacquers, car paints, coating powders, paints, printing inks, security printing inks, facade coatings, coatings for buildings, plastic materials, ceramic material, glass or cosmetic preparations. The invention further relates to a coating composition that contains the effect pigments and to an object that is provided with the effect pigments or the coating agent containing the effect pigment.