Solid marking composition as writing means, a writing instrument, an optically variable marking layer and use of a plurality of optically variable pigments

摘要

A solid marking composition comprises a solid matrix containing at least one type of optically variable interference pigment flakes. The solid marking composition provides a document or article with a copy and counterfeit protection feature, and is preferably used in a writing instrument for applying hand-written anti-counterfeit markings and signatures.