FIELD: aids for forming original image.
SUBSTANCE: method and device can be used for protection of sheet material having original image against imitation. Method is based upon applying metal onto sheet material. Metal is subject to influence at preset points by aid providing connection of points. Salt-containing solution is applied onto sheet material and sheet material is impregnated with the solution. Then extraction of metal is induced from solution at preset points and image is formed from integrity of those points. Original image is created as a result which provides reliable protection from imitation.
EFFECT: improved quality of image protection.
9 cl, 2 dwg
