Method of providing salt-free composite marking based on chiral liquid crystal precursors comprising chiral acrylate dopants on substrate, substrate comprising such marking, and method of changing position of selective reflection band

Abstract

Disclosed is a substrate which has thereon a marking or layer comprising a salt-free cured chiral liquid crystal precursor composition which comprises one or more nematic compounds A and one or more chiral dopant compounds B which are capable of giving rise to a cholesteric state of the chiral liquid crystal precursor composition and are of formula (I) as set forth herein. Also disclosed is a method of providing the marking on the substrate. Also disclosed is a method of changing a position of a selective reflection band exhibited by the cured chiral liquid crystal precursor composition.