Item	B301	B311
Ba+SO4(as ZnS)%(m/m)≥	99	99
Zinc(as ZnS)(m/m)%≥	28	30
Zinc Oxide %(m/m)≤	0.6	0.3
105 Volatile%(m/m)≤	0.3	0.3
Water Soluble%(m/m)≤	0.4	0.3
Screen residues (63um mesh)%(m/m)≤	0.1	0.1
Oil absorption g/100g≤	14	10
Color killing(Compare with standard specimen)%≥	105	105