Water-soluble film with resistance to solubility prior to being immersed in water

A water-soluble film that is resistant to solubility prior to being immersed in water, wherein said water-soluble film having a first surface, a second surface and a thickness between said first and second surfaces, wherein said water-soluble film It comprising: a film-forming composition is formed into said film, wherein said film-forming composition comprises a soluble film-forming material in the primary water that at least partially comprises poly (vinyl alcohol), preferably wherein said soluble film-forming material in primary water comprises 50% to 95%, more preferably 50% to 85%, of said water-soluble film, by weight, relative to the dry substance after the film has been formed; and a salt distributed more proximally to at least one of said first and second surfaces in the thickness of said water-soluble film, preferably wherein said salt comprises from 1% to 15% of said water-soluble film, by weight .