Fluorescent marking liquid
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United States of America Patent
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-
Jan 28, 1992
Grant Date -
N/A
app pub date -
Dec 18, 1989
filing date -
Dec 16, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A new fluorescent aqueous marking liquid is described, which contains 0.20 to 2.0 % by weight of cumarin C.J. Basic Yellow 40 dye. The liquid is buffered to a pH value of from 3 to 5; it contains an acrylic resin dispersion at a pH of 3 to 5 with a particle agglomerate of 35 to 150 nm. The liquid does not act on a third dye, especially triphenylmethane dye, which is used frequently in carbon paper and is used also on smooth surfaces such as glass plastic foil or glazing paper.
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