Sl. No.

Properties

Required Specification

Result obtained

2

3

Prepare 0.5% (w/v) Solution in Distilled Water containing 4% (w/v) of Sodium Chloride in Hamilton Beach Mixer.Adjust pH in the range 8 – 9 and determine rheological properties at 24 ± 2 0C.

I. Apparent Viscosity in Centipoise

II. Gel0 in lbs/100 sq. ft

III. “n” value at 200 and 100 rpm

15 – 25

5.0 (Minimum)

0.4 (Maximum)

17.5

13

0.26

4.

Cross Linking Properties:

To 495 ml of Distilled Water, add 5 ml of 3% (w/v) Solution of Calcium Chloride, add 0.5% (w/v) of the Sample, while stirring in HBM for 20 minutes. Add to it 0.2% (w/v) Chrome Alum Powder and stir further for 10 minutes. Adjust pH 8 - 9 by adding 1N – NaOH and determine rheological properties at 24 ± 2 0C