The invention relates to a method for producing security foils for objects of value such as papers of value consisting of a carrier foil and a cover layer applied thereto, the cover layer having the form of characters or patterns andor coating-free areas in the form of characters, patterns or the like. The device also includes a light sensor provided on the surface of the housing, and a controller coupled to the display and the sensor. Further, as the photosensitive drum is wide open at its upper portion, a range of a laser beam emitted from the scanner unit is widely provided. A common line of intersection is formed at the point of intersection in space. Other applications include utilizing the disclosed PDCs in various articles and apparatuses, such as rotary drill bits. The backing material is configured to be folded into a folded position wherein the folded backing material is positioned between the first and second set of papers in a thickness direction of the notebook.