Near infrared fluorescent security thermal transfer printing and marking ribbons
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Jan 16, 2001
Grant Date -
N/A
app pub date -
Mar 4, 1997
filing date -
Mar 4, 1997
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The present invention relates to thermal transfer ribbons comprising a ribbon backing element and at least one printing media layer comprising at least one near infrared fluorescent compound in a concentration which provides detectable fluorescence without imparting color to a mark made from said printing media layer. Methods for printing marks containing said at least one near infrared fluorescent compounds via thermal transfer and methods for reading said marks are also disclosed.
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