Compared to the volume of the coating layer, the coated food has almost infinitive volume. Therefore, the migration will deplete the antimicrobial a gent in the coating layer, decrease the concentration below the m.i.c., and thus reduce the antimicrobial activity of the coating system. The migration of incorporated antimicrobial agents contributes to antimicrobial effectiveness in the case of packaging systems; on the contrary, no migration is beneficial in the coating system.