Method of producing three-dimensional structural surfaces

A method of producing three-dimensional structural surfaces made on the basis of decor papers used as surface coatings, in particular of wood-based panels, wherein the pattern is applied to the decor paper by printing in a machine equipped with at least one painting ink tank and at least one printing plate, having a surface with a pattern formed by engraved cells, having a form of ink micro-cells of varying sizes, wherein the ink from the ink cells is transferred to the travelling paper web when it comes in contact with the printing cylinder, forming on the paper a pattern corresponding to the pattern formed by the ink cells on the printing cylinder surface, whereupon the decor paper with the finally printed pattern is subject to drying in a drying chamber of the printing press and after drying, it is impregnated with synthetic resins, in particular melamine and/or urea resins, and then after drying in a chamber of the impregnating line it is pressed in the press onto the panel surface using a press plate, characterized in that before the impregnation, at the stage of pattern printing, a mixture is applied to the decor paper, consisting of printing ink, whether with pigment or not, and a swelling agent in the form of microspheres, being encapsulated gas bubbles of sizes ranging from 2 μm to 180 μm, increasing its volume under the influence of rising temperature, wherein the mixture of the ink and the swelling agent contains from 0.3% to 45% by weight of the swelling agent, and after exiting the printing press and after the impregnation, the decor paper with the formed final pattern with a coded three-dimensional structure is pressed onto the surface, in particular of a wood-based panel, using a press plate with any working surface, wherein a maximum temperature in the pressing process is higher than the maximum temperature in the printing press and the impregnating line.