Method of rendering documents resistant to photocopying and...

Details Method of rendering documents resistant to photocopying and... Method of rendering documents resistant to photocopying and...

B - Operations, Transporting

42

D

283/20

B42D 15/00 (2006.01) G03G 21/04 (2006.01)

Patent

CA 1214805

ABSTRACT OF THE DISCLOSURE A document has information appearing thereon, with at least a portion of the information being located on a front face of a portion of the document. The front face portion has a colour with a sufficiently low reflection spectral response to render the document portion substan- tially incapable of being photocopied in an information- readable manner. The document portion is capable of trans- mitting visible light from the rear face to the front face to cause sufficient contrast between the relatively non- translucent information and the transmitted light to enable the information to be read by a human eye viewing the front face of the document when visible light is transmitted through the document from the rear face to the front face.

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