Disclosed herein is a method of forming a graphic image having the appearance of three-dimensionality, the method comprising the steps of: providing a preformed lenticular film having a flat side and having a side with lenticules opposite the flat side; and printing an image on the flat side of the lenticular...http://www.google.de/patents/US5457515?utm_source=gb-gplus-sharePatent US5457515 - Method for forming a graphic image web
