| abstract |
A barrier film (A), characterized in that it comprises a substrate film (1) having an inorganic film formed thereon by vapor deposition (2) and has been subjected to an annealing treatment so that it has a steam permeability of 2.0 g/m<SP>2</SP> day to 0.000001 g/m<SP>2</SP> day and an oxygen permeability of 2.0 cc/m<SP>2</SP> day to 0.000001 cc/m<SP>2</SP> day; and a method for producing the barrier film. The barrier film has an enhanced degree of barrier property sufficient to block the permeation of an oxygen gas, steam and the like, and thus is useful for producing various packaging containers. |