As a reputed firm, we are offering HIGH Quality Bentonite Lumps to our customers all over the country and overseas as well. Made under the vigilance of industry experts, our Bentonite Lumps are known for their purity and optimum quality. Bentonite Lumps are accessible in different packaging sizes for the ease of the buyers. We are Supplier of Bentonite Lumps from MORBI, Gujarat, India.
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. Thus anyone who uses this material should have their eyes open to its advantages and disadvantages.
Body Plasticity – Porcelain
1 part bentonite can plasticize a body as much as 10 parts kaolin. Bentonitic bodies are stronger in the dry form but dry slower, crack more and fire darker with potential iron specks (get a super fine ground grade).
Glaze Suspender – Fritted glazes
1-3% bentonite can greatly improve glaze suspension by geling it. In addition it will harden the dry layer. Coarser varieties can impart some glaze speck. If a glaze already contains more than 15% clay (kaolin, ball clay) you should not need more than 1% bentonite.