Package manufacturing method

A method of manufacturing a package, comprising the steps of:

• preparing a thermoplastic synthetic resin sheet;
• providing an openable mold having mold elements;
• placing said thermoplastic synthetic resin sheet in said mold;
• forming within said mold at least one pocket-shaped molded portion in said thermoplastic synthetic resin sheet in such a manner that it protrudes outward from one surface thereof, and also forming within said mold and on the other surface of said thermoplastic synthetic resin sheet an opening for said pocket-shaped molded portion, to obtain a molded sheet, said pocket-shaped molded portion being caused to have inner and outer surfaces;
• forming a deposit layer over at least one of said inner and outer surfaces of said pocket-shaped molded portion while said molded sheet is held on one of said mold elements and while the one element of the mold is cooled;
• removing the molded sheet with said deposit layer thereon;
• accommodating an object to be packaged within the pocket-shaped molded portion;
• and
• bonding a sealing sheet to said other surface of said molded sheet in such a manner as to seal said opening of said pocket-shaped molded portion.