a deoxidizer parcel has a sack - type parcel body and a deoxidizer contained in the parcel body . at least a part of the parcel body being made of a composite sheet which is composed of a gas - permeable sheet such as a sheet of paper or a non - woven cloth and a plastic film laminated on and bonded to the gas - permeable sheet . the plastic film has a multiplicity of minute pores formed by subjecting the plastic film already bonded to the gas - permeable sheet to an irradiation with a laser beam .