规格800目,白度≥92%,吸油量≤35g/100g,体积密度0.28-0.30g/cm3,烧失量≤6%, 酸中可溶物≤1.5%,水中可溶物≤0.1%,中性,水份≤0.2%; 规格1250目,白度≥93%,吸油量≤40g/100g,体积密度0.17-0.20g/cm3,烧失量≤6%,酸中可溶物≤1.5%,水中可溶物≤0.1%,中性,水份≤0.2% 。