Retrochromic articles have a retrochromic pattern comprising first and second viewable retroreflective regions, wherein at least one viewable retroreflective region comprises a plurality of intrinsically retrochromic beads. Methods for making such articles are also provided. Articles according to the present invention have covert security features, and may be used, for example, to authenticate security articles.


< Surgical blade package

< Sterile container and lid for a sterile container

> Disposable paper weighing dishes

> Apparatus for flame-perforating films and methods of flame-perforating films

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