Pencil Grade

It is a very special grade of bentonite used by the pencil industries as a lead binder. Very selective bentonite having good binding properties even after grinding to fineness of 400 B.S. mesh is used to prepare this grade.

Typical Physical Properties

Form

Finaliy Divided Powder

Free Swelling

23 to 25 ml.

PH

8.5 to 9.5

Moisture

12% max.

Fineness

99.95% through 500 B.S. Sieve

Bulk Density 20/25

0.800