Marking fluid
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United States of America Patent
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-
Dec 8, 1992
Grant Date -
N/A
app pub date -
Mar 14, 1991
filing date -
Jun 30, 1990
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A marking fluid based on an aqueous solution of hydroxyprene trisulfonic acid as a fluorescence dyestuff and having a pH-value in the alkaline range. The marking fluid further includes at least one mono, oligo or polysaccharide, or a polyol derived therefrom by reduction, or a mixture thereof, to improve the properties of the fluid in a number of respects. The marking fluid can be used on a wide range of different surfaces and affords improved fastness in relation to light.
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