The invention concerns a film, in particular a stamping film, laminating film or sticker film, which has at least one anisotropic polymer layer of an at least partially oriented liquid crystal material. The anisotropic polymer layer has one or more first regions which form a first security feature and...http://www.google.es/patents/US7862880?utm_source=gb-gplus-sharePatente US7862880 - Film comprising a polymer layer
