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

41

M

283/20, 92/62

B41M 3/14 (2006.01) G03C 5/08 (2006.01) G03G 21/04 (2006.01)

Patent

CA 1187914

ABSTRACT OF THE DISCLOSURE Confidential information is printed, typed or other- wise applied to paper with a colour having a reflection spec- tral response of less than about 10% for light with a wave- length below about 600 millimicrons. The colour is suffi- ciently contrasting with the information to enable the in- formation to be read by the human eye when the document is viewed under white light, but the document cannot be success- fully photocopied.

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