PRINTED DOCUMENT RESISTANT TO COPYING AND COMPUTER PRINGTING, METHOD OF PREPARING THE SAME, AND METHOD OF VERIFYING A COUTERFEIT BY A FILTER

摘要

It discloses the copying and forgery preventing paper, confirm whether falsification method using the production method thereof, and a filter identifier by the printing computer. Method of producing forgery-proof sheet by radiation and a computer printing in accordance with the present invention, a method of manufacturing a forge-proof sheet by radiation and a computer printing comprising a film producing step and the printing step, either one of the latent image pattern and the background pattern the latent image pattern is formed by a broken line, and an equivalent or background pattern is formed in a manseon, the dotted line and manseon are each disposed at a different angle, and wherein the dotted lines 150 to 200 line screen tone players and 12 to 16% screen density of a has the manseon is characterized by having a 65 to 85 tons of the line screen and the screen was a concentration of 14 to 18%. Forgery-proof sheet by radiation and a computer printing according to the present invention, visual identification of the latent image specific surface is whether difficult one, if the output by using a color copying machine has, and can check that the latent image is saliency counterfeiting, forgery using a filter identifier when the check has confirmed the latent image formed on the non-falsification paper, the printer and the water by the printing machine it does not make the latent image can be determined whether or not a counterfeit.