Bentonites are classified according to several types (e.g. calcium, sodium, potassium) but in the ceramic industry sodium bentonite is the material of commerce (this is the same material used by the drilling industry). Sodium bentonites have incredibly small particle sizes (and thus surface areas). Combine this with the active particle surface chemistry (which makes them hold onto water) and it the most plastic and impermeable common clay material used in ceramics. Its contribution to working properties in glazes and clay bodies is balanced by the undesirable properties that are also imparted (so have your eyes open to the advantages and disadvantages).
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Bentonite 325 mesh in pakistan
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