1. A method for printing inks on a substrate, which comprises the following steps: i) creating a digital file of an original image, ii) processing said digital file to obtain a processed digital file, which processed digital file is made up of a number of compositions of the original image, and comprises the processing of the original image via a computer in such a manner that the processed digital file can be regarded as a computer-synthesized version of the original image, in which transitions between compositions in the processed file are smoothly executed; and further comprises selecting a number of parts of the original image and positioning said parts at random positions, whereupon the thus positioned parts are processed via structure-synthesizing software, wherein said selection of parts takes place via random routines, in which size, dimension and location of the parts can be determined at random, iii) presenting the processed digital file to a printing unit, iv) printing a paper substrate by means of said printing unit, wherein the processed digital file is printed on the substrate by the printing unit as a processed image of the original image, using inks, wherein an original dimension of the original image used in step i) is smaller than a dimension of the processed image being printed on the substrate by the printing unit, wherein a structure-synthesizing software module makes use of routines selected from random generation routines, fractal routines and rendering routines for converting the original image of step i) into a digitally processed image, wherein the extent to which exact copying of the original image takes place is minimized.