Laser marking article and laser marking method
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United States of America Patent
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Apr 27, 1999
Grant Date -
N/A
app pub date -
Jan 2, 1997
filing date -
Jan 8, 1996
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The present invention relates to a laser marking article having two or more layers of thin films on the surface thereof, wherein one of the layers other than the outermost layer is a thin film made of a laser marking ground composition containing a laser beam-absorbing whitish inorganic compound powder and a binder as essential ingredients, and to a laser marking method comprising irradiating said laser marking article with a laser beam. According to the present invention, a vivid white-colored mark can be formed on the surface of an article even in case of low-energy laser irradiation or even in case of high-speed marking.
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