Api 13a section 4 grade bentonite powder: Physical analysis: Properties Protocol Unit Required Result Viscometer dial reading at 600 rpm Api spec. 13a:2004/ iso 13500: 1998 R/min 30 34 Yield point / plastic viscosity ratio Api spec. 13a:2004/ iso 13500: 1998 _ 3 max 2.85 Filterate volume Api spec. 13a:2004/ iso 13500: 1998 Ml 15 max 14.4 Moisture content Api spec. 13a:2004/ iso 13500: 1998 % by weight 10.0 max. 10 Dry screen analysis(residue greater than 75 microns)% Api spec. 13a:2004/ iso 13500: 1998 % by weight 4.0 max. 3.0 - 4.0 Api 13a section 6 (ocma) grade bentonite powder: Properties Protocol Unit Required Result Viscometer dial reading at 600 rpm Api spec. 13a:2004/ iso 13500: 1998 R/min 30 40 Yield point / plastic viscosity ratio Api spec. 13a:2004/ iso 13500: 1998 _ 6 max 4.7 Filterate volume Api spec. 13a:2004/ iso 13500: 1998 Ml 16 max 15.4 Moisture content Api spec. 13a:2004/ iso 13500: 1998 % by weight 13.0 max. 10 -12 Dry screen analysis(residue greater than 75 microns)% Api spec. 13a:2004/ iso 13500: 1998 % by weight 2.5 max. 2.0 Ocma dfcp 4 grade bentonite powder: Physical analysis: Properties Protocol Unit Required Result Yield Ocma dfcp-4 Bbls/2000lbs 90 min 99 - 115 A.P.I. Filterate loss Ocma dfcp-4 Ml 15.0 max. 13 - 14 Moisture content Api spec. 13a:2004/ iso 13500: 1998 % by weight 15.0 max. 10.0 - 12.0 Dry screen analysis 100 mesh sieve Ocma dfcp-4 % by weight 98.0 min. 98.5 Wet screen analysis 200 mesh sieve residue Ocma dfcp-4 % by weight 2.5 max 1.75