Constantia Teich Gmbh

Christof Brunnthaller

Martin Kornfeld

Adolf Schedl

Lambert Nekula

Wilhelm Zuser

Engelbert Scharner

Rainer Huber

Method for producing an aluminum foil with integrated security features. An aluminum foil is rolled down to a thickness of less than 150 &#x3bc;m in a plurality of cold rolling passes, texturing that runs in the direction of rolling being induced simultaneously on both surface sides of the foil. In a final cold rolling pass, the foil is fed to a working roller pair, in which, on at least one roller surface, the relief-like surface structuring generated in the rolling direction by grinding was reduced on the basis of contrast and motif in a region of 10 to 50% relative to the average surface roughness to form a motif for a security feature that is transferred to the surface side of the foil facing the roller surface. The generated aluminum foil has a glossy appearance on both sides such that the security feature rises clearly due to its dull appearance.

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Amstetten, Austria

Christof Brunnthaller