This standard specifies a test method for substances contained in various silica-alumina carbon blacks that cannot pass through an 850 μm sieve. This standard is applicable to the determination of various types of silicon-aluminum carbon black impurities.
HG/T 2797.5-1996 history
2007HG/T 2797.5-2007 Silica-alumina carbon black.Part5:Inspection of impurity material
1996HG/T 2797.5-1996 Determination of silicon aluminum carbon black impurities