Method of making coated carrier particles

A process for the preparation of coated carrier particles containing a carrier core, a polymer coating thereover, and a surfactant present on said polymer, and which process consists essentially of admixing a carrier core with a monomer, accomplishing a supercritical polymerization of said monomer in a supercritical medium, and which supercritical polymerization is effected in the presence of a surfactant, and subsequently adding thereto a second monomer and initiator, and accomplishing polymerization of said second monomer, and wherein said second monomer forms a polymer that is present as a coating on said carrier core.