Substrates secure against unauthorized copying and processes for

Details Substrates secure against unauthorized copying and processes for Substrates secure against unauthorized copying and processes for

1993-10-19

1995-06-20

Ryan, Patrick J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428 29, 428199, 428207, 428211, 428915, 428916, 283902, B32B 300

Patent

active

054259789

ABSTRACT:
Novel substrates bearing visible information applied thereto give indiscernible, for example illegible, photocopies when the information applied using colorant combinations of at least one emitting and at least one reflecting colorant whose shades upon viewing without fluorescence being perceived are similar or identical.

REFERENCES:
patent: 4427627 (1984-01-01), Guerlet et al.

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