Patent ID: 8821756
Filing Date: 2014-09-02
Classification: B41M,B42D,C09K,Y10T

Abstract:
1. A marking on an item or substrate, wherein the marking comprises a layer or pattern of a chiral liquid crystal polymer composition that exhibits an initial set of optical properties and is made by curing a chiral liquid crystal precursor composition in a chiral liquid crystal state and wherein the layer or pattern comprises (1) one or more first areas exhibiting a first modified set of optical properties that is different from the initial set of optical properties and is obtainable by contacting the chiral liquid crystal precursor composition in the one or more first areas with a first modifying agent; (2) one or more second areas exhibiting a second modified set of optical properties that is different from the initial set of optical properties and different from the first modified set of optical properties and is obtainable by contacting the chiral liquid crystal precursor composition in the one or more second areas with a second modifying agent that is of a different type than the first modifying agent.