Pigment/fluorescence threshold mixing method for printing photoc

Details Pigment/fluorescence threshold mixing method for printing photoc Pigment/fluorescence threshold mixing method for printing photoc

1991-10-04

1993-12-21

Bell, Paul A.

Printed matter

Having revealable concealed information, fraud preventer or...

Utilizing electromagnetic radiation

283 91, 283 89, 283902, 162140, 106 19, 25330135, B42D 1500

Patent

active

052716457

ABSTRACT:
Commercially available pigments mixed with fluorescence compound to obtain print stuff mixtures for transfer thereafter to mattes. The print stuff mixtures obtainable thereby are used to print securitY and face-value documents which will be color copier resistant, that is, not be accurately reproducible or replicable by a photocopier. An empirical test is provided which will allow the ordinary skilled printer to determine the best titer of commercially available fluorescence to be used in the ink/pigment mixing scheme.

REFERENCES:
patent: 3713861 (1973-01-01), Sharp
patent: 3928226 (1975-12-01), McDonough et al.
patent: 4066280 (1978-01-01), LaCapria
patent: 4522429 (1985-06-01), Gardner et al.
patent: 4582346 (1986-04-01), Cario et al.
patent: 4884828 (1989-12-01), Burnham et al.
patent: 4921280 (1990-05-01), Jalon
patent: 5018767 (1991-05-01), Wicker
patent: 5084205 (1992-01-01), Auslander

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