Sodium bentonite of exceptional whiteness, studied in international scientific publications, with test results that exceed published industry quality standards.
Bentonite is a volcanic-origin clay composed mainly of montmorillonite, valued for its swelling, plasticity and absorption properties. It is used in drilling muds for the oil and gas industry, in foundry and metallurgy, in waterproofing and sealing, in the food and pharmaceutical industry, and in numerous additional industrial applications.
Our bentonite comes from a deposit of exceptionally white sodium montmorillonite — an uncommon variety, studied and published in two papers in the international scientific journal Applied Clay Science: Cravero, Keith, Murray & Toth (2000), "A white bentonite from San Juan Province, Argentina", and Allo & Murray (2004), "Mineralogy, chemistry and potential applications of a white bentonite in San Juan province, Argentina".
Swelling tests carried out on the deposit exceed the moderate-to-high quality standards published internationally by Inglethorpe et al. (2012) for industrial-grade bentonites.
| Color | White (Pantone 1-3701P) |
| Tyler 200 mesh retention | 98.7% |
| Swelling | 12.8 ml / 2g |
| pH | 8 |
| Moisture | 7% |
| Heavy metals | Trace (As, Hg, Pb < 3 µg/g) |
| SiO₂ / Al₂O₃ | 62.5% / 13.2% |
Chemical analysis: Instituto de Investigaciones Mineras, Universidad Nacional de San Juan (IIM-UNSJ), 2024.
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