with a protective coating on the metallic layer

Full Title

Compositional and structural details of pigments exhibiting interference colours > Interference pigments characterized by the core material > the core consisting of an organic compound, e.g. Liquid Crystal Polymers [LCP], Polymers or natural pearl essence > comprising at least one metal layer adjacent to the core material, e.g. core-M, M-core-M > with a protective coating on the metallic layer