www.pcimag.com/articles/97047-black-iron-oxide

Black Iron Oxide
November 1, 2012
NUBIOLA Nubifer NB-5970, a micronized black iron oxide with a deep bluish undertone and great tinting strength, allows formulators to achieve real bluish-grey color shades. Very low fineness values can be achieved after 10-minute dispersion in a high-speed disperser and filter.
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