Method and apparatus for the manufacture of security and / or value of pressure pieces

The invention relates to a printing device (1) and a method for producing preferably individualized security and / or value of pressure pieces (17). For this purpose, a digital printing device (5) is used, the at least one first ink formulation (11a) and at least one second ink formulation (13a) used for printing having the misprint state at least one physical distinguishing feature. The first and the second ink formulation (11a, 13a) are so used for printing, that first and second print information on the pressure piece (17) are stored so that the print information perceptible to a human viewer of the printed printing piece at a visual inspection only in such a way which form during printing without using the at least one second ink formulation (13a) would result, and the second printing information in an evaluation of the printed pressure piece (17) by utilizing the at least one physical distinguishing feature perceptible.