METHOD FOR ENCODING PRODUCTS

摘要

The invention relates to a method for encoding products, wherein a magnetic composition containing magnetic nanoparticles is applied to at least one pre-determined surface unit of the surface of a product, and is dried and/or hardened. In the magnetic composition, monodispersed isotropic magnetic nanoparticles having at least one pre-determined nominal particle size are distributed homogeneously in a pre-determined concentration. A code is formed from the nominal particle size and/or from the concentration of the magnetic nanoparticles in the magnetic composition. The invention also relates a product encoded in such a way, and to a magnetic composition.