
File folder has a pair of sheet materials which are made of a synthetic resin, are connected via a folding line at one of the longer sides, and are heat welded at a shorter side which adjoins the folding line. Substantially throughout an outer surface of one sheet material is formed a receiving layer, that can receive substances which are displaying media such as various printing inks (e.g., UV ink for printing), thermal transcription inks for printers, ink-jet inks, toners for copying machines,...











