Bentonite
Bentonite is a very fine-grained (colloidal) clay of the montmorillonite type containing bases and iron, derived from volcanic ash. The particle size is probably under 0.03% of the average kaolinite grain. ... information courtesy American Colloid Company. Methylene Blue (meq/100g) >90. Soluble Calcium (meq/100g) <25: Green Strength (psi) 15 ...
اقرأ المزيد