... on drying≤0.5%Fe mg/kg≤5 mgSulphate (SO42-)≤0.05%Pb mg/kg≤1 mgChloride(Cr)≤0.05% ... 1, Kraft paper bag or pp bag of 25 kg or 22.7 kg net each2, 3g, 9g, 10g, 18g, 50g, ... 80g, 100g, 200g, 227g, 250g, 500g, 1000g polythene bags in carton3 ... carton,400g*40/carton, 400g*20/carton, 500g*20/carton,500g*40/carton, 500g*50/carton, 250g*40/carton,227g*40/carton ...