Drilling and civil engineering bentonite is made by API and OCMA standardIt can be used as low solid phase mud in under ground civil engineering and drilling field  The specifications Item Mud  yieldM3T Filter  loss ML30min Yield  1b100ft2 Moisture  Wet Sieve Analysis0074mm gel strength HH01 18 12 3xPV 12 4 18 25 40 HH02 1218 1218 3xPV 12 4 15 20 30