of the hydrophilic portion 16 of the molecule the ionic functionality or the polyether functionality in the case of nonionic surfactants can form stable coordination complexes with many metal ions in addition polyvinyl alcohol forms chelate complexes with transition metals attempting to combine these complexation tendencies in a unique manner water soluble salts of coordinating metals in particular salts of transition metals such as zinc copper and titanium and water soluble boron compounds are added to the release coating compositions in order to bind the hydrophilic end 16 of the release promoting agents into the polyvinyl alcohol mass of film 20 zinc salts are especially desirable since the ammonia complexes of these salts are very stable and water soluble the zinc ion would undergo only minimum complexation with polyvinyl alcohol or the release agent as long as an abundance of ammonia were present thus the bulky zinc ion would not significantly retard the desired migration of the release promoting agent to the surface and only after virtually all the ammonia had escaped from the dried film would polyvinyl alcohol zinc ion release agent complexes form at the surface water soluble boron compounds are added as a material that forms stable adducts to polyvinyl alcohol in order to assist in this binding mechanism it is believed that a water soluble boron compound such as boric acid in conjunction with the coordinating metal induces complexation of the release promoting agent at the surface once the film is dry this complexation retards or substantially prevents migration.