... 125um, ≤0.01%o Whiteness: 93, with annual 50,000me o Supported by SGS, self export authority· Features:o High whiteness, fine ... surface treatment technique, with high activation rate· Technics:o Precipitated calcium carbonate selects high purity limestone as raw ... , size stability and glossiness of products· Main applications:o Rubber manufacture:§ Calcium carbonate was the earliest filler used ...