Pigment/fluorescence threshold mixing method for printing photocopy-proof document
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United States of America Patent
Stats
-
Dec 21, 1993
Grant Date -
N/A
app pub date -
Oct 4, 1991
filing date -
Oct 4, 1991
priority date (Note) -
Expired
status (Latency Note)
Importance
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.
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