Quality

District Kutch of the Gujarat State (India) is famous for good quality clay minerals like Bentonite China clay, Bauxite etc. Low Quality coal Lignite is also found in the area. The District Kutch, an independent terrain of land, having muddy desert on North-East called Rann of Kutch and Arabian Sea on South-West and is the second largest district of the country situated at extreme west end. Both quality of Bentonite, swelling and non-swelling grade, are found in the nearly entire district has deposits of various quality of Bentonite but extensive mining of good quality Bentonite is carried out in Mandvi Taluka. More specifically, village Vandh, Serdi and Hamala are famous for swelling quality and village, Pundi, Goniasar and Asambia are famous for Non-swelling grade. Due to porous crystal structure, Bentonite, pusses’ excellent property of absorption. It absorbs not only water but gases also. It expands several times of its weight volumetrically. It has very high viscosity and forms gel with water. All this properties are of sodium of swelling grade of Bentonite. The non swelling grade requires some chemical treatments to acquire property of absorption and is used in the manufacturer of bleaching earth.

AM-SUPRA
It is a specially process bentonite having high swelling, high gelling index and maximum active clay part. It is suitable for high pressure foundries and for specific casting where surface finish is the important factor.
Typical Physical Properties
Form Finally Divided Powder
Free-swelling 32-35ml
PH 9.5-10.5
Moisture 12% Max.
Gelling Time Instant
Gelling Index 85-90%
M.B. Value 400-450
Fineness 90% throught 200mesh B.S.

It has excellent W.T.S. and G.C.S. and very high bonding capacity.
Instant gelling time and excellent suspension property (85-90%) reduces the time of mold drying.
Retains 50% of its properties even after the heating to 500°C.

Characteristic
Test Results
Wet compression durability (Strength durability) 2050-2080
Wet Shearing Strength (Tensile durability) 420-440
Gas transmission rate 198
Methylene Blue test 45-47ml.
Products
This grad hsa widely excepted by all normal foundries all over and successfully captured sizable market.
Typical Physical Properties
Form Finally Divided Powder
Free-swelling 30-32ml
PH 9.0-10.0
Moisture 12% Max.
Gelling Time Instant
Gelling Index 75-80%
M.B. Value 390-400
Fineness 85% throught 200 B.S. sieve

AM-MAXI
This is a most economic grade of bentonite and is second largest selling part out of three grades formulated.
Typical Physical Properties
Form Finally Divided Powder
Free-swelling 28-30ml
PH 9.0-9.5
Moisture 12% Max.
Gelling Time -
Gelling Index 60-75%
M.B. Value 350-390
Fineness 85% throught 200 B.S. sieve