Anti-photographic/photocopy imaging process and product made by

Details Anti-photographic/photocopy imaging process and product made by Anti-photographic/photocopy imaging process and product made by

1997-01-03

1998-04-07

Han, Frances

Printed matter

Method

283 72, 283 93, 283902, B42D 1500

Patent

active

057355479

ABSTRACT:
Several techniques to acquire a counterfeit proof security document. The invention includes improvements for use with non-replicable image line frequency techniques, as well as stand-along printing techniques, that exhibit electro-optical copy and photographic copy frustration characteristics such as experiences with use of color-graduated (tonally graded) substrates, blooming or flaring print patterns, pixel differentiation of discrete indicia and combinations of these with certain printing ink (or) varnish under/overcoat.

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Bank of Canada (Press Statement) 27 Nov. 89; "New $50 Bill Features Advanced Canadian Technology" IIII Last Other P.A. IIII.

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