Marking composition and laser marking method
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United States of America Patent
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Oct 20, 1998
Grant Date -
N/A
app pub date -
Feb 6, 1996
filing date -
Jun 24, 1994
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A marking composition comprising an energy ray curing resin, a leuco dye and a color developer both of which are low in solubility in toluene, which composition is capable of forming a vivid black color on irradiation with laser beams, and a laser marking method for forming a clear-cut black-colored mark by using the above composition.
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Cited Art Landscape
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