French Chalk

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Name:ShenZhen Zavl Import & Export Co., Ltd

Name:French Chalk

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Name	French Chalk
Chemical composition	Data
Whiteness ≥	78-92%
Dust, mm2/g≤	0.4-1
CaCO3  ≤	1%-4%
Acid-soluble iron	0.2-0.5
PH	7-9.5
Moisture ≤	0.50%
L.O.I. (800oC)≤	6%-22%
Abrasion Degree	80-100
SiO2	35-62%
MgO	25-32%
Fe2O3	≤0.1%
CaO	≤0.5%
Al2O3	≤0.2%
Density (g/cm3)	2.6-2.8
Oil absorption capacity	20.0-50.0
Pass rate(45μm)  ≥	98%
Conclusion	Qualified