COUNTERFEIT-PROOF DOCUMENT WITH ATTRIBUTE OF AUTHENTICITY AND ALSO METHOD OF ITS MANUFACTURING AND DEVICE FOR TESTING

摘要

FIELD: printing.;SUBSTANCE: invention discloses a counterfeit-proof document, in which at least on one area, which is visible from the side surface, at least two different paints are applied. The said paints along the marked direction on the area have concentration curves differing from each other, so that the ratio (R(x)) of the concentrations of at least two different paints varies on the area depending on the location along the marked direction, with at least two different paints are fluorescent paints. The concentration curves are chosen so that at the excitation of fluorescence the area which leads to the appearance of the marked colour print is distinguishable; and at least two different paints have different durability. In addition, the concentration curves and the area size along the marked direction are chosen so that, after manufacturing after a preliminary determined period of validity a distinguishable shift is formed which leads to the appearance of colour print of the area.;EFFECT: invention provides increased protection against forgery of the document, and the simplicity of checking the attribute of authenticity.;35 cl, 12 dwg, 3 ex