4.2 gr/cm3 (min)

 Specific gravity

 250ppm (max)

 Soluble alkaline earth metals as calcium

 0.1% (max)

 Water soluble solids

 125/125cps (max)

 Apparent viscosity before/after adding of gypsum

 6.5 (min)

 PH at room temp.& 180°F

 3w.t% (max)

 Residue on ASTM sieve No:200

 10±5 w.t%

 Residue on ASTM sieve No:325

 30%w (max)

 Particles less than 0.6 µm

 0.2% (max)

 Moisture