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Mean grain size D97 : <10um
Specific surface area : 25,000±500
Dry brightness : 95(ISO.7724)
Mean grain size D97 : <17um
Specific surface area : 20,000±500
Dry brightness : 94(ISO.7724)
Mean grain size D97 : <48um
Specific surface area :10,000±500
Dry brightness : 93(ISO.7724)
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