Thus, the present invention provides a method of producing a composition in powder form comprising the following steps (a) to (c): (a) providing highly dispersed silica particles, hydrophobic silica particles, and a cationic surfactant； (b) forming primary hydrophobic silica particles carrying the cationic surfactant on their surface and/or agglomerates of these primary particles； and (c) mixing the highly dispersed silica particles with the product obtained in step (b), thereby obtaining the composition in powder form； and a composition in powder form obtainable by the method.
