The invention relates to an optically variable marking comprising a semiopaque substrate with a first surface that is covered with an optically variable layer that is for example a liquid crystal polymer layer or a layer comprising pearlescent pigments, and a second surface that is partially covered with a metal layer in the shape of a pattern, to methods of its preparation and to its use for decorative or security applications.

 
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> Optically-based method and apparatus for detecting and characterizing surface pits in a metal film during chemical mechanical polish

> Optical isomer separating filler, production method therefor and application method therefor

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