PARAMETERS UNIT SPECIFICATIONS Parameters Specifications 1. Color / Appearance Fine pale buff to brown colored 2. Moisture (@ 1050 â?? 1100C) 9 â?? 14% 3. pH value 8 â?? 9.5 4. Expandability / Swelling 8 â?? 12 ml 5. Base Exchange Capacity 80 â?? 90 meq 6. Particle size < 200 mesh 70% to 80 min. 7. Heavy Metals Cu < 1 ppm Pb 10 ppm max Hg Traces Zn < 1ppm