| http://www.w3.org/ns/prov#value | - In addition, in place of the individual or combinations of these fillers, up to 50% by weight of the total filler contents and more preferably 15% by weight may be replaced with an inorganic filler, such as alumina, amorphous silica, anhydrous aluminum silicate, barium ferrite, calcium carbonate, mica, feldspar, clays, such as kaolin, talc, magnesium oxide, magnesium silicate, nepheline syenite, p
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