Latent images comprising phase shifted micro printing

Details Latent images comprising phase shifted micro printing Latent images comprising phase shifted micro printing

B - Operations, Transporting

41

M

B41M 3/14 (2006.01) B42D 15/00 (2006.01)

Patent

CA 2071795

A security device comprising a substrate having applied thereto an array of characters, the characters being of a sufficiently small size as to appear uniform when ordinarily viewed but individually identifiable when viewed with the aid of appropriate magnification means, whereby group(s) of the characters are phase-shifted relative to the others in such a manner as to collectively define an image, the image being relatively indiscernible when the device is ordinarily viewed but discernible when viewed with the aid of a finding screen.

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