White powder and method for production thereof
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United States of America Patent
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Nov 16, 2004
Grant Date -
N/A
app pub date -
Oct 11, 2001
filing date -
Apr 13, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A white powder characterized by comprising base particles having on the surface thereof at least one coating film comprising a crystallized-particle aggregate which is capable of imparting a white color based on the scattering reflection of light and which comprises crystallized particles and has voids among the crystallized particles; a white powder characterized in that it comprises base particles having on the surface thereof at least one coating film comprising a crystallized-particle aggregate which comprises crystallized particles and has voids among the crystallized particles, and that a white color is imparted thereto based on the scattering reflection of light occurring between the surface of the crystallized particles and the voids; and processes for producing these.
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