Retro black Mick article having regions of different retroreflective colors

摘要

Retro chromic article (300), and a retro-chromic pattern comprising (340, 342) visible retroreflective the first and second regions, at least visible retroreflective one region, intrinsic retro chromic plurality of beads ( I including the 330). I also provides a method for manufacturing such articles. Have the security features hidden, for example, to authenticate the security article, the article according to the present invention can be used.