A new technique and apparatus for printing that includes the formation of a hologram, or other type of diffraction pattern, directly on a desired end product of paper, or other sheet material. The hologram, or other diffraction pattern, is formed by casting a surface relief pattern directly onto the...http://www.google.es/patents/US4933120?utm_source=gb-gplus-sharePatente US4933120 - Combined process of printing and forming a hologram
Combined process of printing and forming a hologram
