Abstract: A method of manufacturing electrotechnical articles, preferably magnetic keys, from a magnetodielectric composition. The method comprises mixing together iron powder and a thermosetting resin containing a curing agent in vacuo in order to remove air inclusions and the volatile products of the thermosetting reaction; batching the resulting composition; rolling the batched composition to obtain flat sheet blanks of a thickness greater than that of finished products; molding and simultaneously pre-forming the sheets to obtain compacted blanks, and subjecting the blanks first to cold curing and thereafter to step-wise heat treatment.