a trifold side seamed film produce bag includes a front wall and a back wall , first and second side edges sealed together and a seamless bag bottom . the bag is joined at the side edges to additional bags by a perforation . the bag is corona treated on at least one wall and promotional material is printed on the treated surface . the bags are folded to one third of their height to fit compact bag roll dispensers . the bags are folded in a z - fold or c - fold configuration . the method includes manufacturing the bags and winding them onto cores or forming the bags into coreless rolls . an apparatus for forming the side seamed bags includes an extruder , a tubing flattener , a perforator , a sealer , a corona treater , a printer and a slitter . the treated , printed bags may be stored on rolls for later slitting into two bag streams and folding into thirds .