The anti-counterfeiting feature is incorporated within the alufoil itself at the rolling mill stage and creates a unique optical effect. Any imitation by subsequent converting processes like lacquering, printing or embossing can easily be detected. The surface structure is modified by specially designed rolling cylinders in certain pre-defined areas in a sub-micron scale. This produces different grades of reflected light that for example are visible as characters or logos. The surface modification cannot be removed from the foil without destroying the surface itself and the surface structure proves a defined fingerprintunder a microscope.
Source: alufoil.orgAdded: 26 February 2007