Fuente: WIPO "tomato" A process for preparing a slippery surface for an ostomy bag having a polymeric surface includes forming a polyphenol layer on the surface of the ostomy bag; forming a silanization layer directly on the formed polyphenol layer by polymerizing from a solution including: (i) a polymerizable silane or siloxane or combination thereof; (ii) a solvent; and (iii) an acid catalyst, to form an array of silanes or siloxanes or a combination thereof each having ends anchored to the polyphenol layer and opposite ends extending away from the polyphenol layer; and forming a stable lubricant layer over the silanization layer to form the slippery surface.