a magnetic novelty post card incorporating a thin sheet of magnetic material that will self - adhere to metal surfaces , and allowing an image on the front or obverse face and printed material or correspondence on the back or reverse face . a method of manufacturing a magnetic novelty post card that allows a matrix of multiple post card images to be aligned in proper registration with multiple printed paper backs , thus permitting economic and efficient use of existing post card printing plates and permitting the cutting of the multiple images into individual post cards by use of conventional die cutting or shear cutting means .