items\Type	Sodium Base Bentonite		Calcium Base Bentonite
	First grade	Second grade
Methyl blue g/100g     ≥	32	32	30
Colloid value ml/15g    ≥	500	400	48
Swelling value ml/g     ≥	50	20	10
PH value	8.0-9.5	8.0-9.5	6.5-7.5
Wet pressure strength Kpa    ≥	50	40	30
Hot wet tension strength Kpa    ≥	3.0	2.0	1.5
Moisture%             ≤	10	10	10
Finess pass 200mesh screen≥	95	95	95
Pakage	25kg50kg1000kg