... , stabilize soft soil structure, prevent collapse of wall of a well . 5, can improve mud-making volum, reduce ... , CMC-LV, CMC-HV TYPES AND SPECIFICATION CMC (API-13A.B)Property TypeViscosity ( Dial reading at 600rpm, ... sizePAC-RChevron method12.0min.26.0 ml max. 9.0 max.99%Min.through 30meshPAC-LChevron method14. ... 30≥35≥50≥60Filtrate Loss, ml16≤13≤12≤11 ≤26≤18Test StandardAPI 13 I PETROLEUM GRADE CMC