System and method for individualizing security documents

1. A method of individualizing a security document, the method comprising:

providing a document blank with a lamination body, the lamination body, at least in an individualization region of an outer material layer adjacent at least one outer surface, being formed with a multiplicity of perforation openings extending through the outer material layer up to an information layer, the information layer containing graphically perceptible information in the individualization region;

providing the lamination body with a security imprint on the information layer;

providing a digital printing device; and

printing, by way of the digital printing device, individualization information onto an outer surface of the lamination body and printing at least a part of the individualization information through the perforation openings onto the information layer to thereby modify the graphically perceptible information of the information layer;

wherein the printing is performed such that the individualization information cannot be removed without damaging the graphically perceptible information present in the inner information layer prior to the printing of the individualization information.

2. The method according to claim 1 , wherein the perforation openings are micro-perforations with a diameter on the outer surface in a range from 20 μm to 200 μm.

3. The method according to claim 2 , wherein the micro-perforations have a diameter in a range from 30 μm to 70 μm.

4. The method according to claim 2 , wherein the micro-perforations have a diameter of 50 μm+/−10 μm.

5. The method according to claim 1 , wherein the perforation openings have centers disposed at a spacing distance from one another in a range from 1.2 times to 3 times a diameter of the perforation openings on the outer surface.

6. The method according to claim 5 , wherein the spacing distance between the centers of the perforation openings lies in a range from 1.3 times to 1.5 times the diameter.

7. The method according to claim 1 , which comprises providing the lamination body with perforation openings that widen conically from the outer surface in a direction towards the information layer.

8. The method according to claim 1 , which comprises printing the individualization information with at least one preparation containing a solvent and colorants, wherein the solvent attacks a material of one or both of the outer material layer and/or the information layer, so as to promote a diffusion of colorants in the at least one preparation into one or more of the outer material layer, walls of the perforation openings in the outer material layer, and/or the information layer.

9. The method according to claim 8 , which comprises printing the at least one component of the individualization information with pixel accuracy into perforation openings with the at least one preparation.

10. The method according to claim 1 , which comprises printing the individualization information with a plurality of preparations, so that the individualization information is formed partially on the outer surface and partially on the information layer.

11. The method according to claim 10 , which comprises printing the individualization information in full color.

12. The method according to claim 1 , wherein the multiplicity of perforation openings do not extend into the information layer.