LDC is an activated Bentonite , processed from high content of specially selected montmorillonite. LDC gives a green compression strength greater than the standard foundry grade bentonite . Which allow the high quality moulds and high permeability.When in a dry system LDC gives lower strength . Which allows a better shake out.


CHEMICAL PROPERTIES     (On dry basis at 105 oC)




Moisture Content %
5% Suspension , pH  
Swelling ml per 2 g of clay
Liquid Limit % , min.
ml of methylene Blue ml per 0.5 g of clay
Dry particle size % pass 200 mesh , min.



Green Compression Strength kg/cm2
Green Shear Strength kg/cm2
Mould Hardness Scale "B"
Green Permeability Large Orifice
Dry Compression Strength kg/cm2

Method : 89 % New Sand , 8 % LDC , 3 % Water (5 Min. Mixing Time)