MAGNETIC PARTICLE FOR SECURITY INK AND SECURITY INK COMPRISING THE SAME
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United States of America Patent
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Issued Date -
May 19, 2022
app pub date -
Aug 5, 2019
filing date -
Aug 5, 2019
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Abstract
Disclosed are a magnetic particle and a security ink containing the same. The magnetic particle includes a magnetic core, and a metal coating layer formed outside the magnetic core. The magnetic particle has a surface roughness (Ra) of 0.15 μm or less. The magnetic particle according to the present invention is suitable for application to a security ink because an abnormal increase in particle size does not occur after the metal coating layer is formed.
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