Abstract: A method of manufacturing corrugated board uses acid treated zeolite to maintain the freshness of various natural food products for an extended period of time. The method of manufacturing corrugated board using acid treated zeolite comprises a zeolite acid treating process, an adhesive making process, an adhesive applying process, and a board assembling process wherein a corrugated sheet is layered between an upper liner sheet and a lower liner sheet which is then bonded to form a corrugated board. A significant advantage of this invention is that removing the filth or dirt by pre-processing the zeolite with acid treatment maximizes the freshness of food products stored in the corrugated box.