It adapted to process individual sheets or printed substrates in the form of a series of parts of the continuous web, comprising a screen printing group (3) and numbering groups (4), the security document, in particular banknote production of multifunction printer (10) is described for the. Screen printing group (3) is located upstream of the numbering group (4) comprises at least one screen printing unit is designed to print a pattern of optically variable ink (32-33). Optically variable ink comprises a flake which can be oriented by the magnetic field. Screen printing group further comprises a magnetic unit (36) located downstream of the screen printing unit (32-33). Magnetic unit (36), prior to the drying / curing of the optically variable ink, an optically variable effect, to magnetically induced pattern of optically variable ink applied by screen printing unit (32-33) It is designed to be. Screen printing group (3) further, prior to transfer to the numbering group of the printing substrate (4), drying patterns of optically variable ink optically variable effect is induced by the magnetic unit (36) / at least one drying / curing unit designed to cure comprises (37).
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