| http://www.w3.org/ns/prov#value | - The particulate material used as filler component of the subject sheet product can be selected from a variety of materials such as metal oxides and hydroxides as, for example, oxides and hydroxides of silicon, aluminum, calcium, magnesium, barium, titanium, zirconium, iron, zinc and tin; metal carbonates as, for example, carbonates of calcium and magnesium; minerals as, for example, mica, vermicul
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