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See Chinese contents: GB/T 23774-2009 GB/T 23774-2009: Inorganic chemicals for industrial use -- General method for the determination of whiteness
This Standard specifies the terms and definitions, instruments and apparatuses, test procedures and result calculation of the general method for the determination of whiteness of inorganic chemicals for industrial use by the whiteness meter. This Standard applies to the determination of whiteness of powder products in inorganic chemicals for industrial use.
