Retroreflective security features in secure documents

Details Retroreflective security features in secure documents Retroreflective security features in secure documents

2005-04-13

2011-11-22

Sample, David (Department: 1783)

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

C428S323000, C264S400000

Reexamination Certificate

active

08062735

ABSTRACT:
Retroreflective material is used to create security features in secure documents. Retroreflective material in the document or sheets used for document creation is laser engraved to create optically variable images, identification quality grayscale images, different directional images viewable at corresponding angles of incidence, multidimensional images, and floating images. High refractive index glass beads are selectively applied to areas of a document surface using a variety of techniques. The beads may be applied in the form of a pre-determined or personalized pattern.

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