Abstract: The invention relates to loaded microspheres with a mean diameter of 0.001 to 1 mm, and loaded with one or more absorbed or adsorbed active principles, which are obtained by mixing fine-particle polymethyl methacrylate or methyl methacrylate cross polymer with lipophilic or hydrophilic active principles until they have been absorbed or adsorbed by the surface of the polymer and a dry powder, granules or a paste is obtained. When applied to textile or fiber finishing, the loaded microspheres provide extended release of active cosmetic or pharmaceutical active principles.