white ”Marmorino” calcium carbonate
• Our “Micronized Calcium Carbonate” is a“non metalliferous mineral” having a minutelyrombohedral crystalline structure, practicallypure and of exceptional whiteness, which ismicronized on the premises utilizing variousgrinding techniques to obtain grain sizesranging from 5 up to 120 µm..
• The physical and chemical properties of the productare assured. Raw material is extracted from thecompany's own mineral deposits, which originated 72million years ago during the Upper Cretaceous period.Systematic checks on grain size throughout the entireprocessing cycle ensure that the end productresponds fully to technical specifications.
chemical analysis
Carbon Dioxide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .44,05%
Calcium Oxide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .55,54%
Silica . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0,02%
Iron Oxide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0,004%
Aluminium Oxide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . absent
Magnesium Oxide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , traces
Sulphates, Manganese, Heavy metals . . . . . . . . . . . . . . . . . . . . . . .. . . . absent
physical-technical
features
Specific weight . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2,70
Hardness (Mohs) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Crystalline Structure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .Rhombohedral
pH level (average). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9,5
Oil absorption . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .15-18 gr su 100 gr
Jet density . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . , . . . . . .0,8 g/ml
Density after compression . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . .1,4 g/ml
Humidity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 0,2-03 (ASTM 280-33)
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