... . Adding slowly while stirring, We can also be added with aqueous solution. REQUIREMENT INDEX Appearance Free flowing white or yellow powder,non ... , ml 60±10 90±10 90±10 Apparent viscosity , mpa.s ≤6 ≤6 ≤10 pH value 8.0±1.0 8 ... Adding , g/l ≤7.0 ≤10.0 Apparent viscosity , mpa.s ≤4.0 ≤6.0 MV-CMC Adding , g/l 6 ... .0 14.0 3.5 Apparent viscosit , mpa.s ≥15 ≥15 ≥15 Filtration , ml ≤9 ≤9 ≤9 oil drilling ...