a carton for a package of photographic film , such as instant film . the carton is formed of a unitary paperboard blank coated on both sides by a thermoplastic barrier film . the thermoplastic functions as an adhesive when acted upon by heat and pressure , thus sealing portion sof the blank together . each of four corners of the carton includes a gusset folded in such a manner as not to present a raw paperboard edge to the interior . the construction yields an air tight , liquid tight package with an oxygen barrier , and obviates the requirement of many similar packages that the photographic film be separately wrapped in a protective foil or film prior to being placed in a catron . three embodiments of the carton are disclosed .