Pearlescent pigments containing ferrites
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United States of America Patent
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Oct 31, 2000
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N/A
app pub date -
Feb 27, 1998
filing date -
Feb 27, 1998
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Abstract
A pearlescent pigment which is a ferrite-coated iron oxide-coated platy substrate in which the ferrite is substantially free of crystallites is obtained by adding metal ions to a slurry of hydrous iron compound and platy particles and then co-calcining in the metal and iron.
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