Identification device comprising a transponder and a discontinuously metallised retroreflective or holographic image field and method of making such a device

摘要

A method is disclosed of forming a pattern in a metallized region, the method comprising: transferring a metal etching solution to portions of an exposed surface of the metallized region using a printing process; allowing the etching solution to react with the metallized region to selectively demetallize the surface; and washing the selectively demetallized surface.