Abstract: A method of forming stacks of printed material containing a set of printed patterns, each pattern in the set appearing at a selected printing area of each sheet in a selected sequence through the stacks, and the stack of material formed thereby. The method includes printing an arrangement of Y printed patterns along a length of a web in the selected sequence, severing the web in a direction transverse to the direction of travel or length of the web to form a plurality of printed sheets having Z printed patterns positioned along the length. The value of Z is selected to be greater than 1 and to equal a number other than a prime number or a multiple of a prime number of Y. By selection of a Z value as disclosed, the printed patterns in the set appear at a selected printing area in a predetermined sequence on consecutive pages in the stack.