Certificate of currently available technology there are many: the main heat sealing, stitching, wall paper and other technology. Cover with bronzing, hot silver and indentation-based. Heat sealing, stitching process certificates are generally used to make plastic film sleeves or beveled to put folders within the core, but also to do beveled light ribbons, wall paper craft certificate generally do angled light ribbons, made of laminated transparent film is also useful , interstitials placed within the core (inner core to be customized). Materials are leather and velvet, as well as gel (paper peritoneum). With the development of science and technology, materials technology is also changing.