he two types of commercial bleaching clays used in processing edible oils may be characterized as "Natural Bleaching Earth" and "Activated Bleaching Earth." Natural Bleaching Earth is usually a bentonite clay which exhibits absorptive properties in its "natural state." TECHNICAL INFORMATION Cladsorb – Bleaching Earth.Product Description Clear– 6 Grade: It is a activated earth used in bleaching of Crude palm oil manufacturing. It is manufactured by best quality calcium bentonite from our mines.